From this time on, the cycle repeats itself each year so that the adults and young from no more than two successive litters are found in the colony. Those that leave the colony look for new places to start their own colonies. Foods Beavers eat the bark of tender twigs and the new growth between the outer bark and the wood of branches and tree trunks. Preferred tree species include aspen, willow, birch, and poplar. Roots of aquatic plants, marsh grasses, clover, and even certain berries may be eaten during spring and summer.
Corn is eaten where available.
Pine trees are seldom eaten, but may be cut and used for building purposes. Reproduction Breeding starts in January or February. A single annual litter of 3-4 young is born in April, May, or June. A few females have as many as 6 or 7 kits. Although they are able to swim at birth, they seldom come out of the den until they are about one month of age.