As few as 200 to 300 wolverines are thought to remain in the United States, mostly in Montana and Idaho. They are notoriously bad-ass, as this recent essay shows.
For 13 years, the Biodiversity Legal Foundation, based in Louisville, Colorado, has led a campaign to win federal protection for wolverines under the Endangered Species Act. The U.S. Fish and Wildlife Service rejected petitions in 1995 and 2000, saying not enough was known about wolverines to put them on the protected list.In fact, very little is known about these super-sized killer weasels. The Colorado Division of Wildlife has no idea if they live in the state or not.