Wolverines are the largest members of the weasel family, but they look more like small bears with bushy tails.
Conservation groups say the animals need to be listed as threatened under the Endangered Species Act. Ten groups want to force the federal government to protect the elusive wolverines.
The groups estimate there are around 300 wolverines left, sparsely scattered across the Mountain West, including Idaho, Washington and Oregon. Their young depend on snowy, high altitude habitat that could disappear as the climate warms.