Its lips close behind the four large incisor teeth so it can eat underwater. All four feet have five toes. The hind feet are webbed between the toes for swimming. A split second claw on each hind foot is used for combing through their fur. The front feet are small in comparison to the hind feet.
Beaver fur has long shiny guard hairs that repel water.
The fur has dense, soft underfur that provides warmth. Beavers range in color from yellowish brown to black, with reddish brown the most common color. Beavers have broad, flat tails. The tail is almost hairless. It is used as a prop while the beaver is sitting upright and for a rudder when swimming.