There are 2 kinds of beavers, American and Eurasian. The beaver is the largest rodent in North America. Beavers live in North America, Europe, Scandinavia, Finland, Siberia, and Mongolia. The beaver can become 3 to 4 feet long and can weigh 35 to 70 pounds. Beavers have a large, flat tail that is 16 inches.
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.