The Beaver's furry coat is brown, with gray underfur. The webbing on its hind feet help it to swim; claws on the digits of its forefeet give it dexterity in handling food; comblike claws on its hind feet aid in grooming; and it can close its mouth behind its front teeth, so that it can carry woody material without taking in water.
Beavers live in lodges built on islands, on the banks of ponds and on the shores of lakes. To ensure adequate water depth surrounding the lodge, beavers dam streams with logs, branches, mud, and stones.
Hunting, trapping, pollution and habitat loss have affected the survival of the beaver. In the last century, however, beavers have been successfully reintroduced to many of their former habitats.