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Beavers (Castor Canadensis) Contents • • • • • • • • Range Physical description Behavior Habitat Ecosystem Role Diet Reproduction Mortality Range • Found throughout North America • Except Florida, southern California, and southern Nevada. Physical Description • Largest rodents • Weight: 40-50 lbs • Body (including tail): 48 inches in length • Tail: 16-17 in. long, 67 in. wide, ¾ thick Behavior • Nocturnal • Do not hibernate • Territory marking Habitat Dams • Access to food supplies • Protection from predators • Provide underwater entrances to their den • Build new dams during spring Lodges • Only used for safety • Rest • Give Birth • Raise young Ecosystem Role • Maintain wetlands • Slow down the flow of the floodwaters. • Improve water quality • Benefit other species’ habitat Diet • Herbivore • In warm months: variety of aquatic plants • During fall and winter, cambium layer of trees, which is the wood just under the bark. • Life expectancy: about 10 -15 years Reproduction • • • • • Breeding season: Jan – Feb Sexually mature at age 3 Give birth one litter of kits per year Gestation is about 4 months Both parents caring for the kits till they are 2 years old. Mortality • Humans • Bears, wolves, lynx, and otters • External Parasites: Platypsylla castoris • Other causes of death: winter weather, winter starvation, and disease