A grizzly bear roams near Beaver Lake in Yellowstone National Park, Wyo., in this July 2011 photo.
A grizzly bear roams near Beaver Lake in Yellowstone National Park, Wyo., in this July 2011 photo. Jim Urquhart AP file
A grizzly bear roams near Beaver Lake in Yellowstone National Park, Wyo., in this July 2011 photo. Jim Urquhart AP file