Beaver

Wildlife

History and Status

Beavers were common in the North Carolina area and in North America before European settlement. About 60 million are estimated to have lived in North America before extensive trapping. As America was colonized, however, intense unregulated trapping of beavers for fur wiped out most of the populations east of the Mississippi River, including North Carolina’s beavers. The last native North Carolina beaver was trapped in 1897. In the 1930s, beavers were rein- troduced into North Carolina by the agency that has now become the N.C. Wildlife Resources Commission (NCWRC). Since that time, beaver popula- tions have flourished.


Description


The beaver is the largest rodent in North America, weighing between 35 and 50 pounds as adults. However, beavers weighing up to 90 lbs. have been reported. Beavers are 2-3 feet in length, with an additional 10-18 inches for the tail. Males and females are similar in size. Beavers have short front legs and webbed hind feet with a double claw on the second toe that the beaver uses to comb its fur. The beaver’s fur is chestnut brown to blackish, depend- ing on the individual. Two noticeable features are its four large yellow inci- sor teeth used for cutting bark and chiseling trees, and its large flat hairless tail. Muskrats, also an aquatic rodent, are mistaken for beaver, but have rat- like tails and weigh less. The beaver uses its tail for swimming, for commu- nicating warnings, for storing fat and also for support. Beavers are slow and clumsy on land, but agile and quick in the water. Newborn beavers are called kits in their first year and yearlings in their second.





Habitat and Habits

Beavers are herbivores, feeding mostly on the inner bark of many kinds of trees. During the summer, they also consume large amounts of aquatic vegetation. In some areas, they’ve been known to eat corn.


Beavers

Beavers construct dams on flowing water to back up the water so that it becomes deep enough to swim in. They also live on deeper lakes or rivers where they don’t need to build dams. For a home, beavers either build a lodge of sticks and mud in their ponds or they burrow into the high banks of streams or lakes. Both burrows and lodges have underwater entrances. With few natural predators left, beavers can thrive and multiply anywhere there is water and ample food.

Beavers stockpile branches and small trees in autumn to use as food during the winter. They don’t eat the wood, but feast on leaves, twigs and bark. Beavers also cut trails to feed- ing areas and sometimes dig canals to make it easier to transport food back to their lodge or food pile. Autumn is the busy season when they repair dams and stockpile food. Beavers are most active from dusk to dawn.

Beavers mate for life and live in colonies of one adult pair, their kits, and the yearlings from the previous breeding season. This colony

has a territory, usually surrounding their pond and marked by mounds of mud and plant material. They deposit a type of oil that marks their t


People Interactions

Beavers usually stay away from humans, but often beaver territories can over- lap with people’s property. This is how the trouble begins. Beavers often block drainage ditches and culverts, which may cause flooding in agricultural fields and residential areas. They also flood some forest areas, which may kill valu- able timber. They can also destroy timber by chewing on or felling trees. On the positive side, their ponds help control erosion and sedimentation, and they provide valuable habitat for wood ducks and other wetland wildlife.

The best way to prevent conflicts with beavers is to trap them during the regulated trapping season (November 1 through March 31 statewide), when they can be used as a renewable natural resource because its pelt, meat and castor oil are highly valued.