Download Butterflies~RF6c1e29.TMP

Year 11 biology Unit 1 Reproduction
Project
Tuvao Paese 11c
Introduction
The butterfly classification:
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Kingdom:Animalia
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Phylum:Arthropoda
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Class:Insecta
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Order:Lepidoptera
Butterflies are native to all continents except Antarctica
The habitat of Butterflies are found in a variety of different
climate environments. They can be found in Tropical areas,
forests, marshes, rivers, swamps, meadows, farmlands and
gardens
Butterflies sip nectar from flowers, juice from rotting fruit and
drink water
The Butterfly is described as an insect of the order
Lepidoptera. Butterflies alone are called Papilionoidea.
Butterflies characteristically have slender bodies, knobbed
antennae, six legs and four broad, usually colourful wings. The
thorax is the point of attachment for the two pairs of wings the
forewings and hind wings. The Butterfly has a segmented body
in which there are three body parts - a head, a thorax and an
abdomen. On the head are the eyes, antennae and proboscis - the long, flexible "tongue" used to sip nectar and other
liquids. The origins of the name come from their membranous
wings which are covered with tiny scales.
Sexual Dimorphism in Butterflies
Males have two black spots and thin black webbing on their wings
Females have no spots and thick black webbing on their
wings
Courtship in butterflies
 A male butterfly has several methods of determining whether he has
found a female of his own species. One way is by sight. The male
will look for butterflies with wings that are the correct colour and
pattern. When a male sights a potential mate it will fly closer, often
behind or above the female. Once closer, the male will release special
chemicals, called pheromones, while it flutters its wings a bit more
than usual. The male may also do a special "courtship dance" to
attract the female. These "dances" consist of flight patterns that are
peculiar to that species of butterfly. If the female is interested she
may join the male's dance. They will then mate by joining together
end to end at their abdomens. During the mating process, when their
bodies are joined, the male passes sperm to the female. As the eggs
later pass through the female's egg-laying tube, they are fertilized
by the sperm. The male butterfly often dies soon after mating.
 Female insects very picky and will not mate a male butterfly
unless he impresses her, however if the male decides to impress the
female he will flutter/brushes against the female. Covering the
female butterfly with a scent from special scales called
 androgenic, located on the forewing.
Male (upper) and female (lower) Heath Fritillary butterflies () showing courtship behaviour
Videos captured at Melbourne Zoo
Originally From Tuvao Paese
Fertilization in butterflies
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Butterfly eggs grow in size as they mature within the female's abdomen. Egg-laying
is triggered when they reach a certain size, at which time they pass from the ovarie
to the egg chamber. They are fertilised just prior to egg-laying, the male's sperm
having been stored until this time within a receptacle in the female abdomen.
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The sperm is fertilising a sperm.
Mating in Butterflies
Key Ideas
· A butterfly’s metabolism is dependent upon the environmental
temperature. They are “cold blooded”.
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· Butterflies bask in the sun to raise their body temperatures.
· Flight allows butterflies to locate food, mates and host
plants.
· Flight allows butterflies to escape predators.
· Butterflies roost at night.
· Butterflies display puddling behaviour to obtain salts and
minerals.
· Butterflies feed on a variety of liquids, including nectar and
the juices
from overripe fruit, carrion and manure.
· The courtship behaviour of butterflies is unique to each
species.
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The butterflies stay coupled for a period of time. Sometimes a short time sometimes
longer. It is not unusual for the pair to fly while still coupled.
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The purpose of any courtship routine (humans included!) is to discover the suitability
of the potential mate. Part of this process is to discover if the female is already
fertilised (pregnant might be a human parallel), the female can release a pheromone
(chemical) which will show her unavailability, or just not follow the usual mating
routine.
Parts of a Butterfly
Life Cycle of a butterfly
References
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http://www.teachers.ash.org.au/jmresources/butbodyparts/index.html
http://library.thinkquest.org/C002251/cgibin/default.cgi?language=english&mode=chapter&outputmode=0&navmenu=1&javascript=1&chapter=3&sectio
n=2
http://www.naturemuseum.org/online/thebutterflylab/anatomy/internalorgans.html (Information for the adult
body and also naming the internal organs)
http://www.naturemuseum.org/online/thebutterflylab/lifecycle/index.htm#( for the life cycle)
Thankyou for watching 