The black-footed ferret

Black- footed ferrets are nocturnal and primarly hunt for sleeping prairie dogs in their burrows. Though they will also eat mice and other small mammals, birds, and insects, a single black- footed ferret eats about 100 prairie dogs a year and cannot survive without access to large colonies of them. In the wild, black-footed ferrets spend about 99 percent of their time underground. Ferret mating seasons last from March-April. The number of kits born ranges from one to seven  but most commonly only three or four are born.