Stock photography, photos: Bison Grazing on Prairie Stock photos of Bison (Bison bison) grazes for food on the prairie. Theodore Roosevelt National Park, North Dakota. Photograph: © Matthew Thalman Click for a larger image and more information Keywords associated with this stock photo: American Bison, animal, Bison bison, hoof, hooved, hooves, mammal, mammals, ruminant, ruminants, wildlife, graze, grazing, prairie, grassland, America, National Park, National Parks, North America, North Dakota, NP, Theodore Roosevelt National Park, Theodore Roosevelt NP, United States, United States of America, US, USA