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BIRD SPECIES SEEN AT SCOTTSDALE COMMUNITY COLLEGE INDEX OF 74 SPECIES References at end. Text written by staff. Photos by Roy Barnes, Emma Olsen and Dr. John Weser. Abert's Towhee American Kestrel Anna's Hummingbird Ash-throated Flycatcher Bewick's Wren Black Phoebe Black-chinned Hummingbird Black-crowned Night Heron Black-headed Grosbeak Brewer's Blackbird Brewer's Sparrow Brown-headed Cowbird Burrowing Owl Cactus Wren Canada Goose Canyon Wren Cattle Egret Cliff Swallow Common Raven Cooper's Hawk Costa's Hummingbird Curve-billed Thrasher European Starling Gambel's Quail Gila Woodpecker Great Blue Heron Great Horned Owl Great-tailed Grackle Greater Roadrunner Green Heron Green-tailed Towhee Harris's Hawk Hooded Oriole Horned Lark House Finch House Sparrow Inca Dove Killdeer Lesser Goldfinch Loggerhead Shrike Lucy's Warbler MacGillivray's Warbler Mallard Marsh Wren Mourning Dove Northern Flicker Northern Harrier (Marsh Hawk) Northern Mockingbird Northern Rough-winged Swallow Orange-crowned Warbler Osprey Peach-faced Lovebird Prairie Falcon Red-tailed Hawk Red-winged Blackbird Rock Pigeon Rock Wren Ruby-crowned Kinglet Savannah Sparrow Say's Phoebe Sharp-shinned Hawk Snow Goose Song Sparrow Verdin Violet-green Swallow Warbling Vireo Water Pipit Western Kingbird Western Meadowlark White-crowned Sparrow White-throated Swift White-winged Dove Wilson's Warbler Yellow-rumped W arbler ABERT'S TOWHEE (PIPILO ABERTI) Scientific Name: Pipilo aberti Residency: Year-round in western, central and southern Arizona. Diet: Feeds on insects year round. Forages on leaf litter seeds. Predators: Hawks and mammals. Nesting: Nests in shrubs. Abert's Towhees may place nests as high as 15 to 20 feet from the ground. Nests are constructed from cones, non-woody vegetation such as grasses or weed stems. Nest lining consists of animal hair, fine roots, and thinner grasses. Eggs are laid in clutches of five to six, or more. Color ranges from white, bluish, or tan, with little or heavy blotching. Nesting Records: Notes: The Abert's Towhee is on the National Audubon's Society's WatchList, which monitors species that some fear may be approaching Threatened or Endangered status. The Abert's Towhee is on the list due to threats against its habitat, rather than observed population decline. There is a strong correlation between damage to riparian areas due to the presence of livestock, and threats to the survival of the Abert's Towhee, a riparian specialist. Photo: Photo above was taken at the Riparian Preserve at the Gilbert Water Ranch on February 18, 2007. Scottsdale Community College: Riparian Preserve at Gilbert Water Ranch: Back to Index AMERICAN KESTREL (FALCO SPARVERIUS) Scientific Name: Falco sparverius Residency: Year-round throughout Arizona. Diet: Insects (many grasshoppers), small mammals (including voles and mice), small birds (like sparrows), amphibians, and reptiles. Hunts by perching or hovering (often hovers near roads, in tall tress or on telephone poles), then diving down to catch prey. Predators: Fire ants and yellow rat snakes prey upon eggs and young. Red-tailed Hawk, Sharp-shinned Hawk, and Cooper's Hawk prey upon adults. "Eye spots" on back of head serve to confuse would-be predators. Nesting: Builds a cavity nest with no lining material. Lays 1 brood per year consisting of 4-5 eggs, white with dark/brown markings. Adapts quickly to a wooden nesting box. May also use woodpecker hole in cactus or tree, or cliff nook. Nesting Records: Notes: Formerly called Sparrow Hawk (hence the Latin name Falco sparverius) owing to its small size (10 inches total length). However, despite its small size, it will defend its nest against almost any intruder. The American Kestrel is the most common falcon in North America, with habitats as diverse as towns and wild lands. The male does all the hunting during the breeding period (8-12 weeks duration), while the female stays at the nest. Photo: Photo above was taken at Scottsdale Community College on September 16, 2006. Scottsdale Community College: Back to Index ANNA'S HUMMINGBIRD (CALYPTE ANNA) Scientific Name: Calypte anna Residency: Year-round resident, central/southern Arizona. Also a year-round resident along the entire West Coast. Anna's Hummingbird is considered to be a crescent invader from California, a winter resident. Diet: Nectar and invertebrates such as fruit flies, gnats, mosquitoes, thrips, aphids, spiders, maggots, caterpillars, ants, and insect eggs. Predators: Larger birds, including the Western Scrub-jays, American Kestrel, Greater Roadrunner, and the Curve-billed Thrasher. Nesting: Breeding occurs in Spring. Nests are constructed from soft materials such as hair, feathers, and fine strips of bark. Spider webs are used as an adhesive. Anna's Hummingbirds rarely reuse old nests, preferring to construct new ones. Eggs are bean size. Nesting Records: Coon Bluff and Scottsdale Community College. Notes: The Anna's Hummingbird has grown in number since the 1950's, and has expanded its range further south and east. This species' ability to adapt well to an ever-growing suburban environment, and the accessibility and availability of hummingbird feeders and flowers utilized in many suburban areas, has led to the growth in population numbers of this bird. Photo: Taken at Scottsdale Community College on February 23, 2007. Watt Preserve: Scottsdale Community College: Riparian Preserve at Gilbert Water Ranch: Back to Index ASH-THROATED FLYCATCHER (MYIARCHUS CINERASCENS) Scientific Name: Myiarchus cinerascens Residency: Summers throughout most of Arizona. Yearround in southwest corner of the state. Diet: Catches aerial insects. Predators: Red-tailed Hawk and American Kestrel. Nesting: Natural cavity, woodpecker holes (for example, in Saguaro cactus), or nest box, lined with stems, chips of manure, hair and sometimes snake skins. Eggs: 4-5 per clutch, whitish with darker marks. One brood per year. Nesting Records: Notes: May nest in mailboxes, drain pipes or fence posts. Photo: Taken at Coon Bluff on March 25, 2007. Watt Preserve: Coon Bluff: Back to Index BEWICK'S WREN (THRYOMANES BEW ICKII) Scientific Name: Thryomanes bewickii Residency: A winter resident in southwestern Arizona; resides year-round in northern and southeastern Arizona. Diet: Insects and spiders (97%), seeds (3%). Picks up insects from leaves and lower branches of shrubs. Predators: Sharp-shinned Hawk, Greater Roadrunner, and rattelsnakes prey upon adults. Eggs are preyed upon by snakes. House Wren may remove eggs from cavities, contributing to the decline of Bewick's Wren. Nesting: Female and male build nest in a wide variety of cavities (wood-pecker hole, mailbox, fencepost, nest box, tin can, crevice in a wall). Nest made of twigs, hair, leaves and grasses lined with feathers and grasses. Lays 3-8 eggs, white with brown markings. Produces 2-3 brood per year. Nesting Records: Coon Bluff. Notes: A common wren of backyards and gardens. Explores every crevice and competes with House Wren for the nesting cavities. Photo: Taken at Coon Bluff in 2009. Back to Index BLACK PHOEBE (SAYORNIS NIGRICANS) Scientific Name: Sayornis nigricans Residency: Year-round in southern and western Arizona. Diet: Aerial insects. Feeds mostly on insects near the surface of water. In winter, it feeds on insects near the ground. Occasionally eats tiny fish such as minnows, and some small berries. Predators: Few observations, but may include Cooper's Hawks, Northern Harriers, and American Kestrels. Potential nest predators include: American Kestrels, other corvids, Loggerhead Shrikes, and sometimes terrestrial predators (such as red fox, coyotes, and California ground squirrels). Scrub Jays are known to take eggs. Nesting: The female builds a mud-based cup mixed with hair and grasses, lined with finer materials. The nest is stuck to vertical surface with some overhanging protection, for example a cliff, wooden or concrete wall, or bridge. May nest near human activity. Lays 1-6 white eggs. One-two broods per year. Nesting Records: Notes: Often uses the same nest or location for several years. Almost always found near water, therefore affected by human destruction of riparian habitats and diversion of water. Photo: Photo above was taken at Coon Bluff on January 7, 2007. Coon Bluff: Back to Index BLACK-CHINNED HUMMINGBIRD (ARCHILOCHUS ALEXANDRI) Scientific Name: Archilochus alexandri Residency: Summers are spent throughout the state. Diet: Nectar; will also consume insects and spiders, especially the female when laying her eggs. Predators: There have been sporadic reports of predation by the greater roadrunner, the brown-crested flycatchers and the Mexican jay. Snakes eat eggs and fletchlings. Nesting: Breeding occurs from April through July. The nest is a small cup constructed from soft plant down or seeds and mosses; it is held together on top of a branch with spider webbing. The nest is usually lined with hair or feathers. Two bean-sized eggs are laid. Nesting Records: Notes: The black-chinned hummingbird is the most common hummingbird in the western United States, and population numbers have remained stable within the Sonoran Desert for decades. This population stability exists presumably because this bird visits over 90 species of plants in addition to artificial feeders for nectar, rendering this species much less threatened than other species by the growing urbanization throughout its range. Photo: Photo above was taken at Scottsdale Community College on July 23, 2006. Scottsdale Community College: Back to Index BLACK-CROWNED NIGHT HERON (NYCTICORAX NYCTICORAX) Scientific Name: Nycticorax nycticorax Residency: Lives year-round in central and western Arizona. In the northeast corner of Arizona, it is a winter resident only. Diet: Fish, aquatic insects, amphibians, lizards, snakes, rodents, and small mammals. Eats the young of other bird species such as terns, herons, and ibises. Predators: Observed or suspected predators of eggs and young include: raccoons and muskrats, Great Horned Owl, and Ring-billed Gulls. Species which eat the eggs include: Fish Crows, Boat-tailed Grackles, Common Crows, and Blue Jays. Response to predators: occasionally Black-crowned Night-Herons chase and mob crows. Nesting: Singly or in small colonies (there may be up to 12 nests in one tree). Nest is placed in reeds, shrubs, cattails, a tree, or against a tussock. Nest made of coarse twigs, reeds and finer material. Lays 3-5 eggs (light-blue/greenish/pale blue-green). One brood per year. Nesting Records: Notes: Most active near dawn and dusk (crepuscular); roosts in trees during the day. Hunts alone, feeding mostly at night or at dusk. The adults apparently do not distinguish between their own young and those from other nests, and will brood chicks not their own. Photo: Photo above was taken at the Riparian Preserve at the Gilbert Water Ranch on November 18, 2006. Riparian Institute at Gilbert Water Ranch: Back to Index BLACK-HEADED GROSBEAK (PHEUCTICUS MELANOCEPHALUS) Scientific Name: Pheucticus melanocephalus Residency: Resides throughout most of Arizona in the summertime, except for the very southwest corner of the state which is a migration zone. Diet: Feeds on insects, berries and seeds, including spiders and snails. Also able to feed on monarch butterflies. Predators: Steller's Jay and Scrub Jay prey upon nests. Nesting: The female makes the nest from twigs, pine needles, weeds, and rootlets; the lining is made out of materials such as animal hair and thin grass. It is cup shaped and bulky and can usually be found in trees or large shrubs. Pale blue-green eggs with red to brown spots are laid two to five at a time. Nesting Records: Notes: The Black-headed Grosbeak is now able to hybridize with the Rose-breasted Grosbeak, its eastern counterpart, because the treeless prairies of the Central Plains that formerly served as a natural barrier between the two has become settled with towns and homesteads, providing a suitable habitat for each species. Photo: To be added. Back to Index BREWER'S BLACKBIRD (EUPHAGUS CYANOCEPHALUS) Scientific Name: Euphagus cyanocephalus Residency: Year-round in northern Arizona. Winter in southern Arizona. Diet: Feeds on the ground, primarily on insects, weed seeds, grain, and small fruits. Predators: Coyote, Bobcat, Great Horned Owl, and Bull Snakes prey upon nests. Sharpshinned Hawk, American Kestrel and Great Horned Owl prey upon adults. Nesting: The female builds a cup nest, either just above the ground (in a shrub or small tree) or directly on the ground. She lays 1-2 broods per year, 3-7 eggs each. The eggs are gray with brown markings. Brewer's blackbirds often nest in small colonies of up to twenty pairs. Nesting Records: Notes: Often associates with other blackbirds, starlings, and Brown-headed Cowbirds, forming huge winter migration flocks. Taking advantage of human modifications, the Brewer's Blackbird is common in agricultural environments and urban parks. Photo: To be added. Back to Index BREWER'S SPARROW (SPIZELLA BREWERI) Scientific Name: Spizella breweri Residency: Winters are spent in South half of the state, and sumers are spent in the North. Diet: Seeds and insects. Predators: Nest predators include, Gopher Snakes and other snakes. Adults are preyed upon American Kestrel and Prairie Falcon. Nesting: The nest is constructed of grass on or near the ground. Three to five bluish, brownspotted eggs are laid. There are two distinct nesting populations, one is located in the alpine meadows of the Rocky Mountains of the Yukon, and the other is in the sagebrush deserts. Nesting Records: Notes: In areas where habitat destruction and/or fragmentation have occurred due to range management/grazing, population numbers of the Brewer's Sparrow have decreased significantly. When heavy grazing occurs, this often causes the invasion of non-native species of plants, especially grasses that are more prone to fires, resulting in the destruction of sagebrush habitat, so vital to this species. Photo: To be added. Back to Index BROWN-HEADED COWBIRD (MOLOTHRUS ATER) Scientific Name: Molothrus ater Residency: Year-round in southeastern Arizona. In winter: only in southwestern Arizona. In summer: will reside all the way in the northern part of the state. Diet: Insects, grain, grass and weed seeds. Feeds off the ground, but will also visit seed feeders. In the past, cowbirds used to feed on the bugs on bison. Today they often feed alongside horses and cows. Predators: Direct predators of the fledglings include: black racers, black rat snake, and Blue Jays. Eggs are also destroyed by host species, since the cowbird lays all her eggs in the nests of other species. Host species may reject the cowbird egg in one of several ways: ejecting them from the nest, burying them, or deserting the nest entirely. The following species almost always reject cowbird eggs: Western Kingbird, Eastern Kingbird, Blue Jay, American Robin, Gray Catbird, Brown Thrasher, Cedar Waxwing, and Northern Oriole. Most other hosts reject less frequently. Nesting: Has no nest of its own, but instead lays her eggs in the nests of other species (parasitism: see predators section above, and notes section below). She lays 5-7 eggs per breeding session, but usually only one egg per host nest. The eggs are white with dark markings (brown or gray). Nesting Records: Notes: A member of the Blackbird family, the Brown-headed Cowbird is one of the only two parasitic bird species in Arizona, and the only brood parasite common across North America. The female will lay her eggs in the nests of other bird species (known to parasite more than 200 species), which reduces the reproductive success of the other species. Most of these host species (called "acceptors") will incubate the cowbird eggs and raise the young, even at the exclusion of their own young. The remaining species (known as the "rejectors") will reject the cowbird eggs most of the time. Photo: Photo above was taken at Scottsdale Community College on May 23, 2006. Riparian Institute at Gilbert Water Ranch: Back to Index BURROWING OWL (ATHENE CUNICULARIA) Scientific Name: Athene cunicularia (sometimes considered its own genus with the scientific name of Speotyto cunicularia) Residency: Year-round in southern Arizona. In the summer, they reside throughout the state. The Burrowing Owl is a complete migrator to southern Arizona and Mexico. Diet: Insects, scorpions, small mammals, amphibians, lizards and birds. The Burrowing Owl places horse and cow dung around the burrow to attract dung beetles. Predators: Mammals, particularly badgers, are major predators. Domestic cats make up a smaller portion of the predators. Avian predators of both adult and young Burrowing Owls include: Swainson's Hawks, Ferruginous Hawks, Merlins, Prairie Falcons, Peregrine Falcons, Great Horned Owls, Red-tailed Hawks, Cooper's Hawks, and American Crows have all been seen or suspected as predators of adult and young Burrowing Owls. Opossums, weasels, skunks and dogs feed on eggs and young. Nesting: Nests in cavities or burrows in the ground; may use former den of a mammal, or man-made boxes. Lays one brood per year; the number of white eggs ranges from 2 to 12 per clutch. Nesting Records: Scottsdale Community College. Notes: When faced with a mammalian predator during the nesting season, the Burrowing Owl attacks aerially. When faced with an avian predator, they usually escape into burrows. It is interesting to note that Burrowing Owls catch food with their feet. This species is diurnal, hunting both at night and during the day (catches more insects during daytime, and more mammals during night-time). The Burrowing Owl may dig its own burrow, or take over one previously made by prairie dogs, skunks, armadillos, or tortoises (the latter is considered a desert keystone species, since its burrows provide homes to several other desert species). This owl may be found in almost any open environment, including pastures, golf courses, backyards, airports, open lots, cemeteries, and university campuses. A major cause of death is collision with cars. This owl is considered an endangered or threatened species in some states. Photo: Taken at Scottsdale Community College on February 9, 2007. Scottsdale Community College: Back to Index CACTUS WREN (CAMPYLORHYNCHUS BRUNNEICAPILLUS) Scientific Name: Campylorhynchus brunneicapillus Residency: Southwestern Arizona, year-round. Diet: Insects (beetles, ants, wasps, grasshoppers). Predators: Snakes, including Red Racer. Nesting: Pairs normally build a bulky woven nest in natural fortresses such as clumps of cholla cactus or spiny shrubs. However, Cactus Wrens make nests for other uses than breeding; one nest within a territory is used as a nursery, while others serve as sleeping quarters for their parents or decoys to fool predators. They also make individual roosting nests, which they use year round. Nesting Records: Scottsdale Community College, Coon Bluff, Brown's Ranch, Watt Preserve, and the Riparian Preserve at the Gilbert Water Ranch. Notes: The Cactus Wren is the largest wren in North America and is, in fact, Arizona's state bird. Although no North American wren species is considered threatened or endangered, the cactus wren may be declining, according to Breeding Bird Survey data. Photo: Photo above was taken at Scottsdale Community College on April 16, 2002. Brown's Ranch: Scottsdale Community College: Back to Index CANADA GOOSE (BRANTA CANADENSIS) Scientific Name: Branta canadensis Residency: A winter resident in western, northern, and northeastern Arizona. Occurs in several localities, mainly in the high country, but also including a few low elevation sites such as Roosevelt Lake. Diet: Entirely herbivorous. Eats submergent vegetation (aquatic plants), seeds, berries, grasses, sedges, winter wheat, clovers, and waste grain, especially corn. Feeds on the ground and in the water. Predators: Humans are among the most common predators. The adults are not often preyed upon by other species, owing to their large size and aggressiveness. However, coyotes, gray wolves, Snowy Owls, Golden Eagles, and Bald Eagles have been observed taking adults. Goslings are preyed upon by gulls, foxes, and occasionally Bald Eagles. Most important egg predators are foxes (arctic and red), Herring, gulls (Glaucous, Iceland and Glaucous-winged), and jaegers (Long-tailed and Parasitic). Less important are Common Raven, American Crow, and brown and black bears. Nesting: Platform-type nest, or large open cup: made of sticks, mosses, lichens, and grasses lined with down and some body feathers. Nests on the ground at edges of ponds, lakes, or swamps, on rocks or grass hammocks out in the water. Lays 2-10 creamy-white eggs. One brood per year. Nesting Records: Notes: The most widespread and commonly seen goose. Some birds no longer migrate during winter owing to food provided at local ponds by humans. Increased residency can be a nuisance to humans. Adults molt their primary flight feathers while raising young, rendering family groups flightless at the same time. Photo: Photo above was taken at the Riparian Preserve at the Gilbert Water Ranch on February 18, 2007. Scottsdale Community College: Back to Index CANYON WREN (CATHERPES MEXICANUS) Scientifc Name: Catherpes mexicanus Residency: Year-round resident throughout Arizona. Diet: Insects and spiders. The Canyon Wren is not known to drink water; it is possible that it obtains all the water it needs from its insect prey. Predators: Potential predators include; snakes, corvids, hawks, and falcons. Nesting: Male and female build nest of twigs and mosses inside narrow crevice of canyon, rock wall, boulder pile, or building. Nest is lined with spider's silk, feathers, fur, webs, wool, lichens, plant down (soft plant material). May reuse nest from year to year. Lays 3-7 eggs (white with small, faint reddish-brown dots). One-two broods per year. Nesting Records: Notes: The Canyon Wren spends its entire life among rocks and cliffs, preferring steep-sided canyons. It can climb up, down, and across rocks. This bird has a unique anatomy, giving it a competitive advantage when foraging for food. Its vertebral column is attached higher on the skull than it is on most other bird species, and the skull is slightly flattened. These modifications allow the Canyon Wren to thrust its bill into tight crevices without bumping its head. Photo: Photo above was taken at Coon Bluff on November 9, 2006. Back to Index CATTLE EGRET (BUBULCUS IBIS) Scientific Name: Bubulcus ibis Residency: Year-round in southwestern Arizona. In summer, resides throughout the state. Diet: Insects (grasshoppers, crickets, spiders, flies, moths), frogs, reptiles, mollusks, and occasionally birds. Forages in flocks, in both terrestrial and aquatic habitats. Often observed in fields, catching insects that are stirred up by tractors, cattle, horses and other large farm animals. Predators: Eggs are taken by Great-tailed Grackle, American, and Fish Crows. Young and adults are taken by Cooper's Hawk, Harris' Hawk, Peregrine Falcon and Great Horned Owl. Nesting: May nest in colonies, either with other Cattle Egrets (intra-species), or other heron species (inter-species). It builds a platform-type nest in a shrub or tree, and lays 2-6 bluish-white eggs once per year (clutch size ranges from 1 to 9 eggs). Nesting Records: Notes: The Cattle Egret has benefited from agricultural developments, since this bird thrives in open areas, lawns, pastures fields, and along roadsides. One of the most abundant herons, this species is widespread across the Unites States. It has bred in almost all states and populations are increasing. Photo: Taken at the Riparian Preserve at the Gilbert Water Ranch on February 17, 2007. Back to Index CLIFF SWALLOW (PETROCHELIDON PYRRHONOTA) Scientific Name: Petrochelidon pyrrhonota Residency: A common and widespread swallow species in Arizona during summer and migration; seen in southwestern Arizona (including Maricopa County) during migration. In summertime, it is seen in the remainder of the state (northern, eastern and central areas). Diet: Mainly flying insects; rarely berries. Feeds in close-knit flocks. Predators: American Kestrels, Great Horned Owls, Sharp-shinned Hawks, Black-billed Magpies, Loggerhead Shrikes, Common Grackles and Bull snakes. Nesting: Male and female build a gourd-shaped nest with narrow entrance tunnel. Nest made of mud pellets, and lined with grass and feathers. Lays 1-6 eggs, white with brown speckling. One to three broods per year. May even have two broods in the same season. Nesting Records: Notes: Colonial, with many nests lined up beneath eaves of buildings or cliff overhangs (up to 3,700 nests in one spot!). Nests are sometimes built under bridges or in culverts. Members of colony may return to the same nest sites each year. Within a colony birds try to steal mud and grass from each other's nests. A female may carry her eggs in her bill over to another swallow's nest, or even lay her eggs directly in another's nest. Photo: Taken by E.N. Olsen at the Riparian Institute at Gilbert Water Ranch on April 7, 2009. Back to Index COMMON RAVEN (CORVUS CORAX) Scientific Name: Corvus corax Residency: Year-round throughout Arizona. Diet: Omnivorous: eats insects, shellfish, seeds, fruit, small animals (rodents), bird eggs and nestlings, carrion and food scraps. Ravens are scavengers, able to exploit multiple food sources. Increasing populations of this bird species can have a significant negative impact on certain prey species, such as the Desert Tortoise and Least Tern. Predators: Peregrine Falcon, Golden Eagle, and Coyote. Nesting: Both the male and female participate in building the platform-type nest, mostly on cliffs, but also large trees and buildings. Made of sticks, twigs and vine; a depression within the nest is lined with moss, hair and/or grass. They breed once per year, laying 3-8 eggs (pale green with brown markings). This species tends to use the same nest site for many years. Nesting Records: Coon Bluff. Notes: It is interesting to note that this species follows wolf packs to scavenge carrion. The Common Raven is also known to scavenge alongside crows and gulls. The Common Raven is highly intelligent and adaptable, able to survive in extreme ranges of climate from Artic to desert. It is therefore one of the most widespread bird species in the world. From 1968-1993, raven populations increased dramatically within the Sonoran Desert, but since 1993 have leveled off. This population increase is a major concern for some biologists who maintain that ravens sometimes predate animals within the Sonoran Desert who are considered threatened or of "special concern" status, such as the Desert Tortoise or the Chuckwalla lizard. These species suffer from dwindling population numbers from many factors usually associated with habitat loss, and raven predation may be an added threat to species already vulnerable. It’s interesting to note, however, that ravens are often closely associated with human activities, and have even been indicators in some studies of the level to which humans have affected an area This close relationship with human activities seems to indicate that the rise in raven populations and the inverse decline of other native species may be more directly due to the human population explosion that has occurred in the Sonoran Desert within the last few decades. Photo: Taken at Coon Bluff on April 3, 2007. Back to Index COOPER'S HAWK (ACCIPITER COOPERII) Scientific Name: Accipiter cooperii Residency: Year-round resident throughout Arizona, except for the southwestern corner of the state, where it only spends the winter. Diet: Small mammals and birds. Predators: Great Horned Owl and Red-tailed Hawk. Nesting: The male builds a platform nest out of sticks lined with bark; the female lays three to five bluish-white eggs. Nesting Records: Notes: The Cooper's Hawk is a prime example of how human introduction of agents like pesticides into the natural environment can affect the survival of native wildlife. The introduction of DDT in the 1940’s and 1950's has been linked to the dramatic decline in population numbers of this bird, though their population began to increase again in the 1960's. Although the Cooper's Hawk is listed as threatened or of special concern in many states, this species has shown the ability to adapt to breeding in urban environments, which may help to further increase their population. Photo: Taken at Scottsdale Community College on March 9, 2007. Scottsdale Community College: Robbins Butte: Back to Index COSTA'S HUMMINGBIRD (CALYPTE COSTAE) Scientific Name: Calypte costae Residency: Resides year-round along the southwestern edge of Arizona. During the summer, resides throughout western and southern parts of the state. Resides in desert habitat, except during the hottest days of summer when it moves to chaparral, scrub or woodland habitats. Diet: Flower nectar, small insects, hummingbird feeders (some will stay the winter if a consistent food source is available, such as a hummingbird feeder). Predators: Snakes, Loggerhead Shrike, Cactus Wren, Common Raven, Scrub Jays, and Gray Thrashers. Nesting: The small cup-shaped nest is placed in a low protected area in a tree, shrub, cactus, sage, or yucca stalk. Lays 2-3 white, bean-sized eggs per clutch (one brood per year). Nesting Records: Notes: The Costa's Hummingbird is currently on the National Audubon Society's Watchlist due to severe declines in its populations over the last few decades. These declines have been attributed to many factors affecting habitat loss, such as urban and agricultural development, cattle grazing, and the planting of buffel grass for cattle - a plant that fuels fires, thus destroying native plants that aren’t fire resistant, but which are vital to this species for food and nesting sites. Photo: To be added. Back to Index CURVE-BILLED THRASHER (TOXOSTOMA CURVIROSTRE) Scientific Name: Toxostoma curvirostre Residency: Year-round in central and southern Arizona. Diet: Forages on the ground for insects, fruit, berries, seeds (digs holes in the soil with its curved bill). Will visit ground seed feeders and bird-baths. Predators: Egg predators: coachwhips, striped whipsnakes, gopher snakes, common kingsnake, desert spiny lizard, ants, Greater Roadrunner, round-tailed ground squirrel, and Harris antelope ground squirrel. A Harris' Hawk has been observed taking a fledgling. A Mexican boa has been observed constricting an adult. Nesting: Both the female and male build the nest - a bulky loose stick bowl, often in a thorny shrub, in the arms of a chain cholla cactus, or Buckhorn Cholla, or in a small tree. She lays 1-5 pale blue-green eggs with many brown spots. The pair often remains together for an entire year, and raises one to three broods in that year. The nest may be repaired and reused. Nesting Records: Scottsdale Community College, Brown's Ranch, and Watt Preserve. Notes: The Curve-billed Thrasher is the best known of the six thrashers residing in Arizona. It is the most widespread of the western thrashers. Like other thrashers, it spends as much time scurrying around on the ground as it spends flying. It is most common in cholla-rich desertscrub, but also resides in brush thickets in riparian and urban habitats. It competes with Cactus Wrens, driving the latter out of its territory. Conservation status: populations are decreasing in some areas owing to development by humans. Photo: Photo above was taken at Scottsdale Community College on April 21, 2003. Scottsdale Community College: Riparian Preserve at Gilbert Water Ranch: Back to Index EUROPEAN STARLING (STURNUS VULGARIS) Scientific Name: Sturnus vulgaris Residency: Year-round throughout the state. Diet: Primarily insects and other invertebrates, the diet also includes fruits, nectars, grains, and even the eggs of other birds. Predators: Avian Predators: accipiters, buteos, falcons, and owls. Mammalian predators: weasels, rats, dogs, and cats. These predators have a very small impact on population levels of European Starlings, since the latter are not a major food item for any of these predators. Starlings have been observed to fly directly to the ground or into vegetation to escape avian predators. They may also fly in tight flocks to mob avian predators, or to escape from them. Nesting: Five to six pale blue eggs are laid in a cavity such as a woodpecker hole. Nesting Records: Notes: An exotic species introduced into New York City in the 1800's by Europeans, starlings are habitat generalists who often out-compete native birds such as Eastern Bluebirds Tree Swallows, Great Crested Flycatchers and woodpeckers for nesting cavities. Consequently, many of these native species have suffered population declines. Photo: Photo above was taken at Scottsdale Community College on February 23, 2007. Scottsdale Community College: Back to Index GAMBEL'S QUAIL (CALLIPEPLA GAMBELII) Scientific Name: Callipepla gambelii Residency: Year-round in southern and western Arizona. Diet: Seeds, grain, cactus fruit, leaves/green plants, a few insects. Forages primarily in the early morning and late afternoon. Will visit seed feeders on the ground. Predators: Adults are taken by Bobcats, Cooper's, and Harris' Hawk. Coachwhip, King snake, Gopher snake, and Gila Monsters eat eggs. Nesting: Female builds a cup-shaped nest on the ground, under vegetation, and lines it with grass and feathers. She lays eggs once or twice per year. Each clutch may have 8 to 14 eggs (dull white with brown spots). After hatching, the male may take over as care-taker, so the female can start a second clutch. Nesting Records: Notes: The Gambel's Quail form winter flocks of up to 20 birds each, called a covey. The covey splits up for the breeding season. This species has adapted to the dry desert climate, but it reproduces best after good winter rainfall. The Gambel's Quail may hybridize with Scaled Quail. Photo: Photo above was taken at Scottsdale Community College on April 20, 2002. Scottsdale Community College: Back to Index GILA WOODPECKER (MELANERPES UROPYGIALIS) Scientific Name: Melanerpes uropygialis Residency: This species is a permanent resident of the Sonoran Desert. Diet: Feeds upon invertebrates hiding beneath bark trees, as well as on cactus fruit, and even saguaro pollen, when its flower is in bloom. Gila Woodpeckers are able to catch prey with their sticky tongues. They have been known to store food within their nesting cavities for winter usage. Predators: Preyed upon by hawks and falcons. Young are preyed upon by snakes. Nesting: They nest in cavities, which they have excavated with their bills, located within the mid to lower portion of saguaro cacti. The female lays 3-4 eggs within this cavity, and both the male and female incubate the eggs. Nesting Records: Coon Bluff, Brown's Ranch. Notes: The Gila Woodpecker makes holes in saguaro cacti for nesting, benefiting many other desert wildlife species who later inhabit these crevices after the Gila Woodpecker has abandoned them; these species include other birds like the elf and western screech owls, American Kestral, Brown-crested flycatchers, and other animals including mice, rats, lizards and snakes. The Gila Woodpecker also serves the ecological role of seed disperser for the saguaro cactus by eating its fruit, and dispersing its seeds to new locations. The Gila Woodpecker was once a popular bird in California, but the near elimination of the saguaro cacti along California's stretch of the Colorado River has reduced this once wide-ranging bird to only a few hundred pairs in California, and has essentially led this species to almost exclusively reside in Arizona. Photo: Photo above was taken at Coon Bluff on January 7, 2007. Watt Preserve: Coon Bluff: Back to Index GREAT BLUE HERON (ARDEA HERODIAS) Scientific Name: Ardea herodias Residency: Year-round throughout Arizona. Diet: Mostly fish but also amphibians, reptiles, insects, rodents and birds. Predators: Unattended eggs are eaten by Common Ravens. Predators of nestlings include eagles, raccoons, bears, Turkey Vultures and Red-tailed Hawks. Nesting: The nest site is typically in a tree 20-60 feet above the ground or water, although shrubs are also used in nesting. The female will lay 3-5 eggs in a platform type nest made out of sticks. Nesting Records: Notes: The Great Blue Heron is the most widespread and well known of North American herons. They are very sensitive to human disturbances, primarily habitat loss. Great Blue Heron abandon their colony sites after adults and nestlings have been killed by predators. Although this bird's populations have remained relatively stable throughout most of its range, this species is still protected under the United States Migratory Bird Act. Photo: Photo above was taken at Coon Bluff on November 9, 2006. Coon Bluff: Back to Index GREAT HORNED OWL (BUBO VIRGINIANUS) Scientific Name: Bubo virginianus Residency: Year-round throughout Arizona. Diet: Eats squirrels, mice, rabbits, snakes, domestic cats, crows, other owls and hawks. Predators: Only when nest is unattended or the owl is driven away by human activity are the eggs preyed upon by crows or ravens; occasional predation by other Great Horned Owls. Nesting: Uses old nest of hawk, heron, tree hollow, cliff ledge, or the top of a saguaro cactus; adds feathers from its breast to nest. Eggs: 1-4 per clutch, white, 1 brood per year. Nesting Records: Notes: Owls cough up pellets of undigested bones, fur, and feathers. Pellets will accumulate under its roosting spot. Photo: Taken at Brown's Ranch on October 15, 2003. Watt Preserve: Back to Index GREAT-TAILED GRACKLE (QUISCALUS MEXICANUS) Scientific Name: Quiscalus mexicanus Residency: Throughout Arizona, year-round. Moves around to find food (partial migrator in Arizona). Diet: Insects, fruit, crustaceans, fish, bird eggs, seeds and grain (will visit feeders for seed and grain). Predators: Aplomado Falcon, Red-tailed Hawk, Burrowing Owl, and cottonmouth prey on adults. Cats and dogs prey on fledglings. Likely nest predators include cottonmouths and diamondback watersnakes. In urban settings, nest predators include fox squirrels and domestic cats. Nesting: A colony nester, up to thousands of nests. Several females mate with one male. The female builds cup-shaped nest and lays 1-2 broods per year (each brood has 3-5 greenish-blue eggs with brown markings). This species prefers to nest near water in an open habitat with some trees. Also nests in parks, ranches, urban areas. Forms large, noisy roosts in winter. Nesting Records: Scottsdale Community College. Notes: Has been expanding its range from Mexico into North America during the last century, taking advantage of urbanization and irrigation. This bird has successfully increased its populations throughout its range, using human-modified habitats. It damages some crops and is therefore considered a pest species. Photo: Photo above was taken at Scottsdale Community College on May 19, 2006. Scottsdale Community College: Back to Index GREATER ROADRUNNER (GEOCOCCYX CALIFORNIANUS) Scientific Name: Geococcyx californianus Residency: Year-round throughout most of Arizona, except for the very northeast corner of the state. Diet: Omnivore: eats insects (e.g. spiders, scorpions, centipedes), reptiles (e.g. snakes and lizards), small mammals (e.g. rodents), birds (including the eggs and young of other birds), carrion, and some fruit. The roadrunner is an opportunistic feeder, catching small birds at bird feeders and nest-boxes. The roadrunner is able to survive without drinking water, as long the food is high enough in water content. Predators: Adults usually fast enough to evade terrestrial predators. However, they are infrequently predated upon by raptors (Red-tailed Hawk, Cooper's Hawk), and occassionally by crows and ravens. Eggs and nestlings are taken by mammals (coyotes, raccoons, striped skunks), and reptiles (coachwhips and bullsnakes). Nesting: Male and female construct a shallow platform-type nest, in which one or two broods are raised per year. The clutch size ranges from two to six eggs (white or yellowish-white in color, without marks). Interestingly, the male does most of the incubating and feeding of the offspring. The nest is built in a low position within a thorny shrub, small tree or cactus. The pair stays year-round in the same territory. Nesting Records: Scottsdale Community College. Notes: A voracious predator able to run at speeds of up to 18.6 miles per hour, the Greater Roadrunner will even take on the challenge of hunting rattlesnakes! It kills a large prey by beating it against the ground or a rock. Two birds may cooperate in order to kill a large snake. The fledglings are able to catch prey only four weeks after leaving the nest! The Greater Roadrunner thrives in the desert climate as well as anywhere else. It is known to raise its back feathers in the early morning sun, to expose a dark patch of skin, which absorbs solar rays and raises the bird's body temperature. The Greater Roadrunner is a member of the cuckoo family, but is easily distinguished from other birds by its unique body shape, and very long tail. It also has a prominent crest, which it is able to raise and lower. Photo: Taken at Scottsdale Community College on April 24, 2002. Scottsdale Community College: Back to Index GREEN HERON (BUTORIDES STRIATUS) Scientific Name: Butorides striatus Residency: Year-round along southern border of Arizona; summers throughout most of the state. Diet: Frogs, fishes, snails, tadpoles, crayfish and crabs, crickets, dragonflies, water bugs, and sometimes small snakes and mice. Predators: Eggs are taken by snakes, Common Grackles, and Fish Crows. Broadwinged Hawks take adults. Nesting: Flat nest composed of sticks loosely arranged with leaves and twigs. The nest is usually about 10-15 feet above ground. Three to five eggs are laid; they are sea-green to pale green in color. Nesting Records: Notes: Green Heron populations seem to be remaining stable throughout its range and may even be slightly increasing in number within the Sonoran Desert. Photo: Taken at the Riparian Preserve at the Gilbert Water Ranch on February 17, 2007. Riparian Institute at Gilbert Water Ranch: Back to Index GREEN-TAILED TOWHEE (PIPILO CHLORURUS) Scientific Name: Pipilo chlorurus Residency: The Green-tailed Towhee is a winter resident in southern Arizona, but spends the majority of its migration cycle in northern Arizona throughout the summer, particularly for breeding. Diet: Mainly insects and seeds, though sometimes its diet will also consist of fruits and berries. Predators: Sharp-shinned Hawk, Cooper's Hawk, Peregrine Falcon, American Kestrel, Redtailed Hawk, and Nortehrn Goshawk prey upon young and adults. Steller's Jay, Black-billed Magpie, and Gopher snake are nest predators. Nesting: These birds nest within a deep cup constructed from grass, twigs and stems with the interior lined in small roots and hair, among low protected areas like chaparral and yucca. The female typically lays 4 white eggs, which are heavily spotted. Nesting Records: Notes: Conflicts have been cited in association with the Green-tailed Towhee's nesting and foraging, especially in California. These include mining, hiking trails, road construction, conversion of rural areas to urban subdivisions and intentional alteration of habitat to enhance livestock grazing. Large-scale prescribed fires, eliminating the shrub component of these areas can likewise be detrimental to this bird. Photo: To be added. Back to Index HARRIS'S HAWK (PARUBUTEO UNICINCTUS) Scientific Name: Parubuteo unicinctus Residency: Year-round in southern Arizona. Diet: Birds, snakes, lizards, large insects, and small mammals like rabbits and rodents. Predators: Predators of the young include Coyotes and Common Ravens, while Great Horned Owls predate both the young and the adults of this species. Nesting: The nest is a platform made out of small sticks; it is usually found in a yucca, mesquite, or low tree. Three to five whitish eggs are laid. One to two broods per year. Nesting Records: Brown's Ranch. Notes: Threats to the successful survival of the Harris's Hawk largely include habitat loss and degradation due to brush/mesquite control and urban and oil and gas development. Hunting and off-road vehicle use near nest sites have been linked to adult hawks abandoning their young and/or eggs, and some deaths among this species have been attributed to electrocution in areas containing high densities of telephone wires, along with deaths due to illegal trappings/shootings. Population numbers in certain areas of its range have plummeted in the last few decades. Photo: Photo above was taken at Scottsdale Community College on September 16, 2004. Scottsdale Community College: Back to Index HOODED ORIOLE (ICTERUS CUCULLATUS) Scientific Name: Icterus cucullatus Residency: Year-round in Southern tip of the state. Summers are spent in the middle of the state, the northwest and the southeast. Diet: Eats insects, berries, and flower nectar. Predators: No information available. Nesting: Nest is made of coarse grasses and yucca or palmetto fibers, lined with finer materials, and sewn to the bottom of a palm tree leaf. Eggs are 3-5 per clutch, pale with splotches, 2-3 broods per year. Nesting Records: Notes: They will come to sugar-water solutions found in hummingbird feeders. Photo: Taken at Scottsdale Community College on April 13, 2007. Back to Index HORNED LARK (ERMOPHILA ALPESTRIS) Scientific Name: Ermophila alpestris Residency: Year-round throughout Arizona. Diet: Seeds and insects on the ground. Predators: Predators of adults and fledglings include raptors such as falcons, owls, and shrikes. Nest predators (small birds and eggs) include weasels, skunks, ground squirrels, raccoons, house cats, meadow voles, shrews, deer mice, as well as some avian predators (including American Crows and Western Meadowlarks). Nesting: Three to five dark spotted eggs are laid in a grass-lined depression on the ground. Nesting Records: Notes: Though this species is widespread and common, it is declining in some of its range due to urbanization, conversion of prairies to agricultural use and introduction of exotic species. Photo: Photo above was taken at Scottsdale Community College on February 9, 2007. Scottsdale Community College: Back to Index HOUSE FINCH (CARPODACUS MEXICANUS) Scientific Name: Carpodacus mexicanus Residency: Year-round throughout Arizona. Diet: Feeds upon seeds and buds of plants; on occasion it eats insects as well. It forages in flocks on the ground and within trees. Predators: Domestic cats and Cooper's and Sharpshinned hawks have been observed to take House Finch at feeding stations. Nesting: Constructs a cup-shaped nest made of grasses, hair, cotton and other plant fibers. Their nests are very compact, and are placed in saguaro, buckhorn cholla, other cacti, shrubs and trees. The female lays 2-6 paleblue eggs with black spotting. Nesting Records: Scottsdale Community College, Brown's Ranch, and Coon Bluff. Notes: Though native to the southwestern United States, the House Finch was introduced to the northeastern United States in the 1940's. A conjunctivitis virus that was first recorded in 1996, and that kills or blinds most infected birds, has been afflicting this bird, mostly among House Finches of the eastern U.S., though presence of the disease has been recorded in Finches as far west as Texas. Because the House Finch seems to be the primary host of this disease, it is thought that the probable decrease in genetic resistance (due to the initial small population introduced and released in the eastern U.S.) is responsible for this species' susceptibility to the virus. Bird feeders placed too closely together, or with feeding mechanisms that enable large numbers of birds to feed at once, may be responsible in promoting the continued transmission of this virus. Photo: Photo above was taken at Scottsdale Community College on May 23, 2006. Scottsdale Community College: Back to Index HOUSE SPARROW (PASSER DOMESTICUS) Scientific Name: Passer domesticus Residency: Throughout Arizona, year-round. Diet: Insects, spiders, small fruit, waste grain, crumbs and weed seeds (comes to seed feeders). Forages on the ground and in foliage. Predators: Avian predators include Cooper's Hawk, Sharp-shinned Hawk, Northern Harrier, Merlin, American Kestrel, and Loggerhead Shrike. Predators of nesting adults, young or eggs include cats, dogs, raccoons, and snakes. Nesting: Female and males build a domed-cup-shaped nest. Three-seven white eggs with brown markings per brood (2-3 broods per year). Builds nests in both natural and constructed habitats, including bird-houses, under eaves of houses, in signs or nooks of commercial buildings. Nesting Records: Scottsdale Community College. Notes: Introduced from its native Europe in the 1850's, this bird has successfully spread across the North American continent and is now abundant in urban, residential and agricultural areas. Stays near people and buildings - will incorporate human-made materials into nests, including scraps of plastic, paper, and whatever else is available. Aggressively competes with native species that also nest in cavities - will kill adult birds, and the young and eggs of other birds, in order to take over a cavity or bird-house. May be causing the decline of some native species. Photo: Taken at Scottsdale Community College on February 25, 2007. Scottsdale Community College: Back to Index INCA DOVE (COLUMBINA INCA) Scientific Name: Columbina inca Residency: Year-round in southwestern Arizona. Diet: Fruit, grain and weed seeds (will visit seed feeders on the ground). May feed alongside poultry. May gather in large flocks in good feeding areas. Inca Doves huddle in stacks, a behavior known as "pyramid roosting." A pyramid may be three levels high and include twelve doves. Predators: Domestic cats stalk adults and eat eggs. Great-tailed Grackles and Blue Jays take eggs. This bird is a major part of the Cooper's Hawk diet. Nesting: Male and female build a platform nest, constructed of loose twigs, grass and leaves. Lays two white eggs per clutch (2-3 broods per year). Nesting Records: Notes: The Inca Dove population is increasing in the United States. It thrives in an arid environment - it is now common in urban areas in the Southwest. This species will reuse the nests of larger doves such as Mourning Doves. Photo: Photo above was taken at the Watt Preserve on January 2, 2007. Coon Bluff: Back to Index KILLDEER (CHARADRIUS VOCIFEROUS) Scientific Name: Charadrius vociferous Residency: Year-round resident of Arizona. Diet: Invertebrates. Predators: The killdeer's predators include many birds of prey, foxes, coyotes, domestic cats and dogs, raccoons and skunks. Nesting: Four buff, spotted eggs are laid in an indentation in the ground with a few pebbles scattered around for camouflage. Nesting Records: Scottsdale Community College. Notes: This species of bird helps to control the insect populations within its local ecosystems, including mosquitoes, locusts and ticks. Being highly adaptable to human-modified habitats, Killdeer reside along virtually every lower-elevation water course, in irrigated fields, lake shores, golf courses. This bird is very common within its range. Photo: Taken at the Watt Preserve on January 2, 2007. Watt Preserve: Scottsdale Community College: Riparian Preserve at Gilbert Water Ranch: Back to Index LESSER GOLDFINCH (CARDUELIS PSALTRIA) Scientific Name: Carduelis psaltria Residency: Year-round resident of southern and central Arizona, and a summer resident in northern Arizona. Diet: Feeds upon seeds. Is a strict herbivore with the exception of an occasional insect. Predators: Sharp-shinned Hawks, Loggerhead Shrikes, and American Kestrels take adults. Brewer's Blackbird is known to destroy nestlings. Nesting: The female constructs a cup-shaped nest of grass, hair, feathers and plant matter. Nesting Records: Notes: Populations of this species seem to be remaining stable or even increasing throughout its range. Photo: To be added. Back to Index LOGGERHEAD SHRIKE (LANIUS LUDOVICIANUS) Scientific Name: Lanius ludovicianus Residency: Year round resident of Arizona. Diet: Hunts insects. When food is in abundance, the Shrike will often store food by impaling it upon a sharp pointed object for later use. When insects are not prevalent, this bird will kill small mammals (like mice), reptiles, frogs, and even some birds as large as the Northern Mockingbird. A Loggerhead Shrike kills birds and rodents by descending upon the prey from above, thrusting its bill into the base of the skull, and using the curved portion of the bill to sever the prey's spinal cord. Predators: Owls, hawks and falcons. Nesting: The male Shrike displays carcasses of impaled birds and insects close to the breeding period. Once the female has chosen her mate, the two then construct the cup-shaped nest together. They have 1-2 broods per year, each consisting of 4-7 eggs (off-white with dark markings). Nesting Records: Notes: Distinguished by its black mask across the eyes. Although it is a songbird, the Loggerhead Shrike acts like a small bird of prey: it uses sharp objects (barbed wire fences and thorns) to skewer prey so it can tear the flesh apart (or store the food for later use). Hence, the Loggerhead Skrike earned the nickname of "Butcher Bird." This species lacks strong feet (raptors have strong talons to hold prey in place), but the beak does have a hooked tip for tearing flesh. Populations have declined in the last 30 years. Factors include: pesticide use killing its major food source - grasshoppers; increased human disturbances; reduction of suitable habitat, and increased competition with other birds such as the American Kestrel. Photo: Taken at Scottsdale Community College on February 6, 2004. Brown's Ranch: Scottsdale Community College: Coon Bluff: Back to Index LUCY'S WARBLER (VERMIVORA LUCIAE) Scientific Name: Vermivora luciae Residency: The Lucy's Warbler is a summer resident of Arizona. Diet: This warbler eats mostly caterpillars, beetles and leafhoppers foraged from trees and shrubbery. Predators: Wood rats, Gila Monsters, lizards, and snakes eat eggs. No information on adults. Nesting: Nests are built in pre-existing cavities in velevet mesquite and cottonwood trees. These birds will also use old woodpecker cavities. Nesting Records: Notes: Brown-headed Cowbird parasitism is causing problems for this species. This warbler is on the Audubon's WatchList due to its limited breeding distribution and threats to its habitat. Photo: Taken at Coon Bluff by E.N. Olsen on March 17, 2009. Coon Bluff: Back to Index MACGILLIVRAY'S WARBLER (OPORORNIS TOLMIEI) Scientific Name: Oporornis tolmiei Residency: Migrates through the state and found in Northeastern corner of the state during summers. Diet: Insects and invertebrates; it forages in undergrowth for food. Predators: No information found. Nesting: Nest is a cup of weeds and grasses, placed low in shrub or bush. Eggs: 3-6 per clutch, white with brown marks; 1 brood per year. Nesting Records: Notes: To protect against predators, females perform distraction displays and feign injuries near nest. Photo: To be added. Back to Index MALLARD (ANAS PLATYRHYNCHOS) Scientific Name: Anas platyrhynchos Residency: Year-round throughout Arizona. Diet: Mostly aquatic vegetation, but also grains and insects. Predators: Coyote and Great-horned Owl. Striped skunk eats eggs. During breeding season females are preyed upon more than males. Nesting: Nest is reeds and grasses lined with down, on ground near water. Eggs: 8-10 per clutch, pale greenish color, 1 brood per season Nesting Records: Scottsdale Community College. Notes: Male defends feeding area in water while female is building nest. Male has iridescent green head. Female is brown streaked. They will return to place of birth. Photo: Taken at the Watt Preserve on January 2, 2007. Scottsdale Community College: Riparian Institute at Gilbert Water Ranch: Back to Index MARSH WREN (CISTOTHORUS PALUSTRIS) Scientific Name: Cistothorus palustris Residency: Spends winters in most of Arizona; resides year-round in the western region of the state. Diet: Eats aquatic insects, spiders, and sometimes bird eggs. Forages on the ground and in dense foliage. Predators: Snakes prey upon them occasionally. Nesting: Spherical nest of soaked reeds, grass and cattails. Nest is lashed to marsh grasses 1-3 feet above ground. Eggs: 3-8 per clutch, cinnamon brown with dark spots, 1-2 broods per year. Nesting Records: Notes: When courting the male will build 5 or 6 "courting nests." The female may then choose one of them or build a new nest. Photo: Taken at Coon Bluff on April 3, 2007. Coon Bluff: Back to Index MOURNING DOVE (ZENAIDA MACROURA) Scientific Name: Zenaida macroura Residency: Year-round resident throughout Arizona, although Morning Doves have been known to migrate to South/Central America during the winter. Diet: Feasts upon grain, seeds and fruit. Young are fed "pigeon milk," a liquid substance created by their parents by grinding up seeds and grains in their mouths, and then regurgitating it back into the mouths of the young. Predators: Adults and young are heavily preyed on by raptors (mostly falcons and accipters), mammals (especially raccoons, domestic cats and dogs), and some snakes. Nesting: Builds simple platform nests from soft twigs, in which both the male and female incubates the eggs. This species is known to nest in buckhorn cholla cacti and velvet mesquite trees. Nesting Records: Brown's Ranch, Coon Bluff, Scottsdale Community College. Notes: Though this species is the most widely hunted game bird in all of North America, the mourning dove seems to be maintaining its population, probably due to its ability to adapt to nearly any habitat, from farm yards, to prairies, to woodlands or suburban parks - and of course, to deserts. Photos: Taken at Scottsdale Community College in 2007. Scottsdale Community College: Back to Index NORTHERN FLICKER (COLAPTES CHRYSOIDES) Scientific Name: Colaptes chrysoides Residency: Year-round resident in nothern, eastern and central Arizona. Winters in southwestern Arizona. Diet: This bird eats insects and during breeding season, fruits, berries, nuts and seeds (will visit bird feeders). Owing to a hammering system that is weaker than other woodpeckers, the Northern Flicker forages upon the ground, mostly catching ants and beetles. The saliva of the Northern Flicker contains an antacid that neutralize the acid within ants. Predators: Adults and fledglings are taken by Sharp-shinned Hawks, Cooper's Hawk, Broadwinged Hawk, Red-shouldered Hawk, and Northern Harrier. Red-headed Woodpecker, American Crow, Fish Crow, bull snake, and Blue Jay are known to eat nestlings. Nesting: Lays 5-9 white eggs in excavated cavities, in a tree, cactus or post. Will also use a nest-box. Both male and female build the nest and raise one or two broods per year. Nesting Records: Notes: The Northern Flicker appears to be in decline, presumably due to habitat loss (including loss of stags), and through competition of resources with the European Starling. Photo: Taken by E.N. Olsen at Brown's Ranch on February 24, 2009. Back to Index NORTHERN HARRIER (CIRCUS CYANEUS) Scientific Name: Circus cyaneus Residency: Lives year-round only in the very northwest corner of Arizona. Spends winters anywhere in the state. Diet: Rodents, insects, snakes, small waterfowl, small birds and young birds. Predators: American Crows and Northern Ravens destroy eggs. Raptors, such as the Great Horned Owl, kill fledglings and nestlings. Nesting: The platform nest is often placed on the ground in marshes. Male and female build the nest out of grass. Four to six bluish-white eggs are laid (one brood per year). Nesting Records: Notes: Formerly known as the Marsh Hawk due to its habit of hunting over marshes. The Northern Harrier is one of the easiest hawks to identify: it is a low-flying hawk, gliding just above the ground. This species has suffered population declines throughout its range within the past century. These declines are attributed to loss of wetland habitat and to changes in farming practices, including pesticide use, which either directly contributes to habitat loss, or otherwise affects this species' prey population. Photo: Taken at Scottsdale Community College on January 13, 2007. Scottsdale Community College: Back to Index NORTHERN MOCKINGBIRD (MIMUS POLYGLOTTOS) Scientific Name: Mimus polyglottos Residency: Year-round resident throughout Arizona. Diet: Eats insects, crayfish, lizards, small snakes, wild fruits and berries. Feeds mainly upon insects and fruit (fruits make up 50% of the diet). Mockingbirds forage mostly upon the ground, flashing their wing bars to startle prey into movement and then lunging after them. May come to bird feeder for raisins, other fruit, or bread. Predators: Sharp-shinned Hawks, Loggerheaded Shrikes and Great-horned Owl. Snakes and squirrels will eat eggs. Nesting: Male Northern Mockingbirds build several nests, from which the female picks one and lines it with grasses. The female then lays two to six bluish eggs that are spotted brown, all of which are incubated by both the male and female (1-3 broods per year). Nest is made of twigs, mosses, plant stems, cloth, string, and dry leaves lined with rootlets and grasses. Nest is in a shrub, vine tangle, cactus or tree 3-10 feet off the ground. Nesting Records: Scottsdale Community College. Notes: They form territories of 1-2 acres, 2 times a year. The mockingbird is a natural pest controller in its ecosystem, controlling populations of insects, which it eats in large quantities. This bird also serves as a seed disperser for plants, as it eats a variety of fruits and berries. In the late 18th and early 19th centuries a strong market for caged mockingbirds rendered the species nearly extinct in many large cities, but today however, the mockingbird's populations seem to have stabled, and even flourished in sub-urbanized areas. Photo: Taken at the Riparian Preserve at the Gilbert Water Ranch on November 18, 2006. Brown's Ranch: Scottsdale Community College: Back to Index NORTHERN ROUGH-WINGED SWALLOW (STELGIDOPTERYX SERRIPENNIS) Scientific Name: Stelgidopteryx serripennis Residency: Summers are spent throughout most of the state, year-round in Southwest corner. Diet: Eats insects while flying. Predators: Young and adults are preyed upon by toads, frogs, snakes, and mammals. Nesting: Nest is made of grass, leaves, twigs, moss and straw. It is placed in a cavity such as a cave or a drainpipe. It lays 4-8 white eggs per clutch, and has 1 brood per year. Nesting Records: Notes: After breeding season they will form large flocks that roost together in marshes or fields. Photo: Taken at Coon Bluff on March 25, 2007. Coon Bluff: Back to Index ORANGE-CROWNED WARBLER (VERMIVORA CELATA) Scientific Name: Vermivora celata Residency: Summers in eastern and norther part of Arizona; winters in southwest. Central Arizona is a migration zone. Diet: Eats insects and berries. In winter, comes to bird feeding stations Predators: Nests are preyed upon by Garter snakes. Nesting: Cuplike nest of bark strips and grasses placed in ground or in a shrub. Eggs: 3-6 per clutch, creamy white with reddish-brown markings, 1 brood per year. Nesting Records: Notes: It has an orange crown that is hidden under the olive head feathers unless its chest is raised. Photo: Taken at the Riparian Institute at Gilbert Water Ranch on April 7, 2009 by E.N. Olsen. Back to Index OSPREY (PANDION HALIAETUS) Scientific Name: Pandion haliaetus Residency: Spends summers in northeast part of Arizona, and winters in southwestern corner. Diet: Eats mostly fish. Predators: Bald Eagles prey upon nestlings. Great-horned Owls take mostly nestlings, but are known to kill adults. Also humans (pesticide use). Nesting: Made of sticks lined with moss and grass placed in a tree, cliff or human structure 5200 ft. high. Eggs: 2-4 per brood, whitish with reddish-brown blotches, 1 brood per year. Nesting Records: Notes: When breeding, they react to predators in two ways; by diving at the intruder and by making alarm calls. When feeding, this bird hovers over water, dives down, and catches prey in its talons. Fish are carried head first. Male brings female all of her food during breeding. Photo: To be added. Back to Index PEACH-FACED LOVEBIRD (AGAPORNIS ROSEICOLLIS) Scientific Name: Agapornis roseicollis Residency: An exotic, introduced species that has been sighted in urban areas throughout Phoenix and Tucson. Diet: Eats seeds, berries, flowers, and fruit. Predators: May be preyed upon by snakes and hawks, but no known natural predators. Nesting: Nest is a cavity found in a cactus, tiles of a roof, or cracks in a house. Fronds are used for building material. Eggs: 7 per clutch, multiple broods per year. Nesting Records: Notes: Population has established from release of caged birds. Will feed each other. Photo: Photo above was taken at Scottsdale Community College on February 25, 2007. Scottsdale Community College: Back to Index PRAIRIE FALCON (FALCO MEXICANUS) Scientific Name: Falco mexicanus Residency: Western North America from the Canadian prairies and southern valley of British Columbia to the Mexican border; winters are spent farther south. Diet: Small mammals, insects, reptiles, and ground dwelling birds. Predators: Coyote, Bobcat, Great Horned Owl, and Golden Eagle. Nesting: The nest is located on a ledge or cliff; true falcons do not make their own nest. Three to six reddish, spotted eggs are laid. Nesting Records: Notes: Due to the use of DDT falcon populations greatly declined until 1972 when it was banned, and populations may still be declining in some areas of its range due to habitat loss, and possibly due to nest robbing by humans or through rodent poisoning. Photo: The photo at left was taken at Scottsdale Community College on January 20, 2007. Scottsdale Community College: Back to Index RED-TAILED HAWK (BUTEO JAMAICENSIS) Scientific Name: Buteo jamaicensis Residency: Year-round throughout Arizona. Diet: Mostly Rodents. Are often seen perched on telephone poles watching for prey. Predators: Adult hawks have few predators, but eggs and nestlings can be predated by Great-horned Owls and by Corvids. Nesting: Both the male and female construct a nest of twigs and bark, lined with feathers and plant material. The nests tend to be 2-3ft in diameter and 3ft tall and are usually built in tall trees or cacti such as the saguaro, or on cliff ledges. When natural structures are unavailable for nest sites, buildings are sometimes used. Nesting Records: Notes: The Red-tailed Hawk plays an important role in its local ecosystem by controlling the populations of rodents and rabbits, as well as by providing habitat for some small birds that live in active Red-tailed Hawk nests. Photo: Taken by E.N. Olsen at Scottsdale Community College on February 24, 2009. Back to Index RED-WINGED BLACKBIRD (AGELAIUS PHOENICEUS) Scientific Name: Agelaius phoeniceus Residency: Year-round throughout Arizona. Diet: Insects and weed seeds. Comes to bird feeders for cracked corn and mixed seeds. Predators: Marsh Wrens may kill young without eating them and puncture eggs. Hawks and owls prey upon adults. Nesting: Nest of reeds and grasses lined with finer material. Nest placed 3-8 ft off the ground in reeds and grasses or shrubs. Eggs: 3-5 per clutch, pale greenish blue with dark marks, 2-3 broods per year. Nesting Records: Notes: Nests placed over deep water are safer from predators. Photo: Male photographed at Scottsdale Community College on February 22, 2007. Coon Bluff: Scottsdale Community College: Riparian Institute at Gilbert Water Ranch: Back to Index ROCK PIGEON (COLUMBA LIVIA) Scientific Name: Columba livia Residency: Year-round throughout Arizona. Diet: Grains, seeds, and fruit. Predators: In North America, predators of this bird include raccoons, Great-horned Owls, Golden Eagles, American Kestrels and Peregrine Falcons. Nesting: Two white eggs are laid in a poorly built nest made out of sticks and other materials placed in a sheltered niche. Male and female raise 3-4 broods per year. Nesting Records: Scottsdale Community College. Notes: The Rock Dove, also known as the Rock Pigeon, has very high and stable population numbers, in part due to city dweller feedings. In fact, periodic trappings and poisonings occur in some areas to reduce numbers. This bird utilizes urban and other human-occupied environments quite well, so it has probably not had much of a negative effect on native birds. Photo: To be added. Back to Index ROCK WREN (SALPINCTES OBSOLETUS) Scientific Name: Salpinctes obsoletus Residency: Year-round throughout Arizona. Diet: Insects and spiders. Predators: American Kestrel, antelope ground squirrel, and snakes such as the racer. Nesting: The nest is usually found in sheltered sites such as in between boulders, cracks, crevices, gopher burrows, steep banks of washes, and in the cracks of brick and adobe buildings. The nest is built out of weeds, grasses, twigs, and bark; it is lined with softer materials such as feathers and hair. Four to eight brown speckled eggs are laid. Nesting Records: Notes: This bird is currently widespread and common throughout most of its range, because much of its habitat is largely unaffected by human activity. However, livestock grazing near nesting Rock Wrens is thought to be responsible for an increase of parasitism by Brown-headed Cowbirds, and may eventually prove a threat to this species. Photo: Taken at Coon Bluff on January 7, 2007. Coon Bluff: Back to Index RUBY-CROWNED KINGLET (REGULUS CALENDULA) Scientific Name: Regulus calendula Residency: Year-round in northern Arizona; winters in southern and central part of the state. Diet: Eats insects, spiders, and some fruit and seeds. Drinks tree sap. Predators: Sharp-shinned Hawks - and they are known to mob the Ruby-crowned Kinglet by flying close to its head. Nesting: Nest made of mosses, twigs and lichens; lined with fur and other fine materials. Hangs from branch 2100 ft. above ground. Eggs: 2-11 eggs per clutch, creamy white with brown marks. Nesting Records: Notes: Feeds at the tips of branches by hovering and gleaning from leaves. Constantly flicks its wings. Photo: Taken at the Watt Preserve on January 2, 2007. Watt Preserve: Coon Bluff: Back to Index SAVANNAH SPARROW (PASSERCULUS SANDWICHENSIS) Scientific Name: Passerculus sandwichensis Residency: Winters throught most of Arizona, summering in the northeastern part of the state. Diet: Insects and insect larvae, will also consume other arthropods. Will eat seeds when outside breeding season. Forages on the ground, flocks only during nonbreeding season. Predators: Nesting: Nests built on the ground with an external layer of course grasses, lined with a tightly-woven cup of softer grasses. Clutch size is 2-6 eggs, which are pale green, blue, tan or white, with speckles or streaks; egg coloration varies considerably between subspecies. Nesting Records: Notes: Savannah Sparrows have very strong natal philopatry, and are very likely to return each year to the precise area they were hatched; this has resulted in the differation of the species into 17 recognized subspecies. Photo: Taken by E.N. Olsen at Scottsdale Community College on February 17, 2009. Back to Index SAY'S PHOEBE (SAYORNIS SAYA) Scientific Name: Sayornis saya Residency: This species is a year-round resident within southern Arizona. During summer, it also resides in northern Arizona. Diet: Feeds upon a variety of insects. This bird is a "sit-and-wait" insect catcher, although it sometimes will catch insects in mid-flight. Predators: Preyed upon by hawks and falcons. Nest predators (known or suspected) include rattlesnakes, red squirrels, chipmunks, Merlin, Clark's Nutcracker, and domestic cat. Nesting: Nest locations vary greatly from rocky ledges and trees to barns. Regardless of location, the nest is often made of mud, grasses, weeds, mosses, twigs, spider webs, and other materials, and is cup-shaped. This Phoebe may lay 7-12 eggs in one season. Nesting Records: Scottsdale Community College. Notes: Population numbers of this species seem to be stable throughout all of its range, including the Sonoran Desert. This bird seems to benefit from urbanization through humanmade structures used for nest sites. Photo: Taken at Scottsdale Community College on March 5, 2007. Watt Preserve: Scottsdale Community College: Back to Index SHARP-SHINNED HAWK (ACCIPITER STRIATUS) Scientific Name: Accipiter striatus Residency: Year-round in northern Arizona; winters are spent in central and southwestern Arizona. Diet: Small birds. Predators: Adults and young are vulnerable to raptors. Bald Eagles are known to kill them during migration. Nesting: Platform nest of sticks lined with bark, placed in tree 10-90 ft. high. Eggs: 3-8 per clutch, whitish with dark marks, 1 brood per year. Nesting Records: Notes: Catches small birds midair and carries them off to eat. May hunt around bird feeders. Largest numbers seen in spring and fall in migration flights as it flies along coasts or mountain ridges. Photo: To be added. Back to Index SNOW GOOSE (CHEN CAERULESCENS) Scientific Name: Chen caerulescens Residency: Spends winters in the Southwestern corner of Arizona. Diet: A variety of plants: aquatic, grasses, and grains. Also digs up the roots and tubers of aquatic plants. Predators: Herring and Caribou are egg predators. Bald Eagles and Coyotes prey upon adults. Nesting: Made of grasses and down; built near water. Eggs: 2-6 per clutch, creamy white to dirty gray, 1 brood per year. Nesting Records: Notes: Parents will defend nest by spreading wings open over goslings in the face of a predator. Usually they will abandon the nest upon loss of 1 or 2 eggs. Photo: Taken at Scottsdale Community College on January 10, 2007. Scottsdale Community College: Riparian Institute at Gilbert Water Ranch: Back to Index SONG SPARROW (MELOSPIZA MELODIA) Scientific Name: Melospiza melodia Residency: Year-round throughout Arizona. Diet: Insects and seeds. They forage mostly on the ground. Predators: Domestic cats like to prey on them when they are foraging on the ground. Also preyed upon by hawks and falcons. Young and eggs are eaten by snakes. Nesting: The female sparrows build cup-shaped nests made of twigs and weeds that are located in dense low-growing brush or cacti, or in the ground. The females lay 2-5 eggs, which may be plain or spotted. Nesting Records: Notes: Populations of Song Sparrows are relatively stable. They were considered abundant in Colonial times, and because they prefer brushy habitats, seem to have benefited by the clearing of the dense forests that once covered North America. Photo: Taken at Coon Bluff on April 4, 2007. Riparian Preserve at Gilbert Water Ranch: Back to Index VERDIN (AURIPARUS FLAVICEPS) Scientific Name: Auriparus flaviceps Residency: Year-round through all of the state except the Northeast corner. Diet: Mainly insects, but small spiders, berries, small fruits and seeds are sometimes eaten. Predators: Adults and juveniles are taken by Sharpshinned Hawks and Cooper's Hawks. Nests are preyed upon by Loggerhead Shrikes, Scrub-Jays, and most likley the coachwhip snake. Nesting: Verdin are likely to build their nests in a Blue Palo Verde (or in another palo verde tree), in a Catclaw Acacia, or in a Velvet Mesquite tree. The male may build many bulky twig nests before the female chooses the one she wants. The female will lay 3-6 pale green eggs with red-brown dots. The nests are large and oval or spherical. They are placed far out on branches, and may last many years in the desert environment. Nesting Records: Scottsdale Community College, Coon Bluff, and Brown's Ranch. Notes: Verdin populations are declining through much of its range, probably due to habitat loss caused by land development. Photo: Photo above was taken at Scottsdale Community College on April 18, 2003. Scottsdale Community College: Riparian Preserve at Gilbert Water Ranch: Brown’s Ranch: Back to Index VIOLET-GREEN SWALLOW (TACHYCINETA THALASSINA) Scientific Name: Tachycineta thalassina Residency: Spends summers in most of Arizona, everywhere but the southwestern corner. Diet: Catches insects in the air and on the ground. Predators: Little information, House Wrens may destroy eggs in swallow nests near their own. Nesting: Nest made of straw, grasses, twigs and rootlets, lined with feathers, and placed in a natural cavity or nest box.Eggs: 4-6 per clutch, white, 1-2 broods per year. Nesting Records: Notes: Have been observed helping other birds raise their young using the previous nest as their own, may nest in groups. Photo: To be added. Back to Index WARBLING VIREO (VIREO GILVUS) Scientific Name: Vireo gilvus Residency: Spends summers in most of Arizona, all but the southwestern corner. Diet: Eats insects and some berries. Predators: Steller's Jay is a likely predator. Both sexes will approach predator and "mob" it. Nesting: Nest made of leaves, bark, grasses and plant down. It is bound with spider web, lined with horse hair and stems and suspended in horizontal tree branch 4-90 ft. above ground. Eggs: 3-5 per clutch, whit with brown spots. Nesting Records: Notes: Has an easily recognizable warbling song. Photo: To be added. Back to Index WATER PIPIT (ANTHUS SPINOLETTA) Scientific Name: Anthus spinoletta Residency: Spends winters throughout most of Arizona, and summers in southern region of the state. Diet: Eats insects and seeds. Predators: Dear mice and Northern Raven may kill nestlings and take eggs. Adults are preyed upon by American Kestrel and Barn Owl. Nesting: Nest made of grasses and twigs, lined with fine materials, built on the ground. Eggs: 5-6 per clutch, gray-white with dark marks. Nesting Records: Notes: Also known as the American Pipit (Anthus rubescens). Photo: To be added. Back to Index WESTERN KINGBIRD (TYRANNUS VERTICALIS) Scientific Name: Tyrannus verticalis Residency: Summers throughout the state of Arizona. Diet: Eats insects caught midair, and some berries. Predators: Black-billed Magpie, Cooper's Hawk, American Kestrel, and Great-horned Owl attack eggs or nestlings. The adult Western Kingbirds aggressively defend their nest against predators. Nesting: Nest is an open cup, made of twigs, plant stems, rootlets and lined with finer materials. They are built in trees, or on poles and other human-made structures. Eggs: 2-7 per clutch, creamy white with heavy dark spots around larger end. Nesting Records: Notes: Has an orange-red crown that is normally concealed, but is exposed during aggressive encounters; is aggressive to large birds near nest. Photo: To be added. Back to Index WESTERN MEADOWLARK (STURNELLA NEGLECTA) Scientific Name: Sturnella neglecta Residency: Winters in southern Arizona. Year-round in the nothern two-thirds of Arizona. Diet: Eats primarily insects while breeding, and fruits and grains while not breeding. Predators: Hawks. Incubating or brooding birds are also predated upon by domestic cats, dogs, foxes, and skunks. Nesting: The partially-domed nest is usually placed in a grassy tussock, 3-7 spotted white eggs are laid in the grassy nest. Nesting Records: Notes: This species is abundant throughout North America, but is declining in some areas of its range, including Arizona, presumably due to a loss of native grassland habitat. Photo: Photo at right was taken at Scottsdale Community College on March 5, 2007. Scottsdale Community College: Back to Index WHITE-CROWNED SPARROW (ZONOTRICHIA LEUCOPHRYS) Scientific Name: Zonotrichia leucophrys Residency: Winters throughout Arizona. Diet: Insects and seeds. Predators: Sharp-shinned Hawks, American Kestrels, Scrub-Jays, and Crows. Nesting: The cup-shaped nest is made out of fine grasses and is placed on or near the ground. Three to five pale bluish, dark-spotted eggs are laid. Nesting Records: Notes: The White-crowned Sparrow may be declining in some areas of the western United States. Photo: Photo at right was taken at Scottsdale Community College on October 15, 2003. Scottsdale Community College: Coon Bluff: Riparian Preserve at Gilbert Water Ranch: Back to Index WHITE-THROATED SWIFT (AERONAUTES SAXATALIS) Scientific Name: Aeronautes saxatalis Residency: Year-round in southwestern part of Arizona; summers throughout the northern and eastern regions. Diet: Eats insects that it catches while flying. Predators: American Kestrel and Prairie Falcon prey upon adults and fledged juveniles. Nesting: Nest is made of feathers glued together with its sticky "saliva." Attaches nest to the vertical surface of a crevice, rocky cliff or building. Lays 3-6 white eggs per clutch. Nesting Records: Notes: Highly social, sleeps in roosts of hundreds of birds. Photo: To be added. Back to Index WHITE-WINGED DOVE (ZENAIDA ASIATICA) Scientific Name: Zenaida asiatica Residency: Year-round in southern Arizona; in summertime, they also reside in central Arizona, horizontally across the state. Diet: Eats weed, flower and other plant seeds, acorns, cactus fruit, and waste grain. Predators: Nest predators include Great-horned Owl, Gila Woodpecker, Cactus Wren, Great-tailed Grackel, and ringtail. Hawks and raptors occasionally take adults. Will perform broken wing display to lead predators away from nest. Nesting: A 4-25 ft. high nest is constructed of twigs, sticks, grass, and weed stems. The nest is placed at the fork of a horizontal branch, or on top of a deserted nest in a tree. Lays one to four creamy white eggs (23 broods per year). Nesting Records: Notes: May roost and nest colonially, particularly in mesquite thickets. Photo: Taken by Galen Hartman at Robbins Butte on March 16, 2009. Back to Index WILSON'S WARBLER (WILSONIA PUSILLA) Scientific Name: Wilsonia pusilla Residency: Migrates through Arizona. Diet: Insects (caught while flying) and berries. Predators: Domestic cats, small hawks, snakes and nocturnal mammals. May perform broken wing displays in response to predators. Nesting: A bowl-shaped nest is constructed out of leaves, grasses, mosses. Positioned on the ground usually at the base of a shrub. One brood per year, consisting of 2-8 eggs, creamy white with fine reddish spots. Nesting Records: Notes: Both male and female are olive-green above and yellow below. Male has black cap. Photo: To be added. Back to Index YELLOW -RUMPED WARBLER (DENDROICA CORONATA) Scientific Name: Dendroica coronata Residency: Year-round in central and southeastern part of Arizona; summers in northeast corner, and winters in southeast corner. Diet: Eats insects and especially berries in the winter; comes to feeders for suet and fruit. Predators: American Kestrel and other corvids. In response, both parents will drag wings through leaves to make noise. Nesting: Nest is a cup of twigs, grasses, and rootlets, lined with finer materials, and placed 5-50 ft. up in conifer. Lays 3-5 eggs per clutch; eggs are cream-colored with brown marks. Nesting Records: Notes: One of the most common warblers in the United States. It is the only warbler able to digest the waxes found in the fruit it eats; this competitive advantage allows this species to further its range. Photo: Taken at the Watt Preserve on January 2, 2007. Scottsdale Community College: Watt Preserve: Coon Bluff: Robbins Butte: Back to Index REFERENCES Bird information was obtained from the following sources: Arizona Game and Fish Department. "Arizona Wildlife Views - Special Edition: Birds of Arizona." Vol.35, No.8, August 1992. Cornell Lab of Ornithology. All About Birds (website). Cornell Lab of Ornithology and the American Ornithologists' Union. The Birds of North America Online (website). National Audubon Society. National Audubon Society Field Guide to North American Birds: Western Region. Knopf: revised edition, September 1994. Sibley, David Allen. The Sibley Guide to Bird Life and Behavior. Knopf: first edition, October 2001. Stokes, Donald and Lillian. Stokes Field Guide to Birds: Western Region. Little, Brown and Company: 1996. Tekiela, Stan. Birds of Arizona: Field Guide. Adventure Publications, Inc.: Cambridge, Minnesota, 2003.