Loss of habitat and extermination programs led to the demise of wolves throughout most of the United States by early in the 20th century. In 1973, the U.S. Fish and Wildlife Service listed the northern Rocky Mountain wolf (Canis lupus) as an endangered species and designated Greater Yellowstone as one of three recov­ery areas. From 1995 to 1997, 41 wild wolves from Canada and northwest Montana were released in Yellowstone National Park. As expected, wolves from the growing population dispersed to establish territories outside the park. More than 1,600 wolves now reside in Idaho, Montana, and Wyoming. The wolf was removed from the endangered species list in Montana and Idaho in May 2011, and will be removed from the list in Wyoming when the state has a wolf management plan approved by the USFWS.

Report A Sighting of this species.

Updated 6/13/11