A grizzly bear roams through the Hayden Valley in Yellowstone National Park in Wyoming in this May 18, 2014 file photo. The U.S. Fish and Wildlife Service proposed on March 3, 2016 stripping Endangered Species Act protections from the grizzly bear in and around Yellowstone National Park, saying the animal's numbers have rebounded sufficiently in recent decades. (Photo by Jim Urquhart/Reuters)
