Though it's a member of the weasel family, the wolverine looks like a small bear with a light stripe on its rump. It seeks out backcountry and wilderness areas, denning in rock crevices or in hollow logs. Females with young are particularly wary of humans and will abandon dens if anyone comes too close. Though the wolverine used to inhabit territory from Washington to Maine, the wolverine vanished from the eastern and midwestern states during the 1800s. Currently, the largest populations are in Montana, where wolverines live in the Cabinet-Yaak ecosystem, as well as other northern forests. They are threatened by the proposed Rock Creek copper and silver mine and continued heavy logging and roadbuilding.

Federal species of concern, state threatened.