Beavers have a short, small body with a broad, round head with small ears. The beavers coat has a rusty brown color. The undercoat is made up of soft, gray fur. The beaver has a large lung and liver. The large lung makes it possible for the beaver to swim for 15 minutes underwater.
Beavers use their tail as a rudder.
All they have to do is change the angle of their tail to turn. The beaver has a special nose and ears that close to keep out water. On land, the beaver is helpless, but they can slap their tail to make a warning to all beavers in a half a mile away. The beaver is very timid and usually work at night for their own safety. Beavers eat the bark of trees.