Steve Hinch - Bison, Yellowstone National Park, Wyoming, USA. What an incredible photograph! I would be running for my life right about now . . . these guys are more dangerous than the bears in Yellowstone!
Bison are herbivores, grazing on the grasses and sedges of the North American prairies. Their daily schedule involves two-hour periods of grazing, resting and cud chewing, then moving to a new location to graze again.