Castor canadensis

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  • Beaver |  Photo: Tim Rains, NPS
  • Beaver |  Photo: Tim Rains, NPS by v8.6m

Beaver Photo Gallery

Basic Information






American Beavers are generally between 35 and 46 inches in length.


up to 20 years in the wild


Beaver (Castor canadensis) facts, habitat, diet, range, beaver pictures and more to help you learn to identify nature's engineer.


Beavers are herbivores that consume tree bark and cambium, which is the soft tissue just inside the bark. Particular favorites include willow, maple, poplar, beech, birch, and aspen trees


Female birth 1-4 kits.


Mid-west, Great Lakes, New England, Mid-Atlantic, Rocky Mountains, Southeast, Southwest, Pacific Northwest, Alaska

What does the Beaver look like?

American Beavers are large aquatic rodents and also the largest member of the Rodentia family. Their tails are flat and shaped like paddles. When stressed the beaver will slam its tail against water. Its hind feet are webbed and their incisor teeth continously grow.

Beaver Habitat


Beaver Facts

Beavers make it through winters by eating stored food caches and using fat reserves. Beavers are normally active at night, but it is quite common to see them at dusk and dawn. The American Beaver was once nearly trapped to the point of extinction. Its populations have since recovered. Beavers live in large family groups called colonies. Beavers engineer dams according to the water speed. In slow water the dams are built straight, in faster water beavers curve dams to add stability.

Beaver Distribution

See also