Castoridae - beavers
 There are two species in this family, the American beaver and the
Eurasian beaver. Beavers spend a lot of tie in the water and have many adaptations that help them thrive in an aquatic environment. They have thick, waterproof fur, and webbed hind feet to help propel it through the water. When the beaver is under water, its nose and ears close up and a special membrane covers its eyes. Beavers flat tails and long sharp upper and lower incisor teeth that they use to cut into trees and woody vegetation. Live the incisors in all rodents, these teeth grow throughout the beaver's life.
The American beaver is North America's largest rodent. It is found throughout North America except for the northern most parts of Canada, parts of Florida, the desert Southwest, and Mexico. The Eurasian beaver from northern Europe east to Siberia. It is the largest rodent in Europe. It look like the American beaver. The Eurasian beaver is more likely to live in a burrow than a lodge.
 Endangered in N.H.
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 Threatened in N.H.
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 Introduced
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 Endangered in U.S.
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 Threatened in U.S.
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