USA - Yellowstone National Park - Bison

Bsion from Yellowstone National Park graze after they crossed the Yellowsotne National Park border onto the Gallatin National Forest and private land in the Gardiner Basin, Montana. The bison can be shot and harvested by four different native American tribes as part of their treaty rights to hunt bison that leave Yellowstone National Park. Under new bsion managments rules the Yellowstone bison will be allowed to wander into the Gardiner Basin during the winter but must be back in Yellowstone N (Photo by William Campbell/Corbis via Getty Images)