They are champions in the water. They have a flat tail for steering and strong, webbed feet to supply the power. Their large lungs can store lots of air and they can hold their breath for about 10 minutes. Although beavers are fantastic swimmers, they are very awkward on land. Their webbed feet are the size of Ping- Pong paddles and cause them to move very slowly on land.
All beavers have very sharp, large front teeth that they use for cutting.
Scientists call animals with special teeth like this rodents. They must chew to trim their teeth to keep them from getting too long. The more they use their teeth, the sharper they become. Furry lips close behind their front teeth to keep water out when they go underwater. They have 20 teeth in total with chisel-shaped ends.