Conflicts can arise between coyotes and humans. Beaver dams can cause flooding of crops and roads. Beavers can spread disease, for example, giardia in drinking water Beavers can cause damage to forests and landscaping. Beavers can dam irrigation canals preventing water from flowing to farmland. Beavers can undermine dams and roads built by humans.
Beavers can cause cause problems for some endangered plants and animals.
It is possible to control damage done by beaver. In the 1700s and 1800s hats made from beaver were very popular. The people who made these hats used arsenic in tanning the hides. They became ill. The name beaver is from an old Native American word Mni, which means brown and refers to the animal's fur.