American Bison, Bison, Buffalo, Bison bison, fauna, Mammal, Mammals, North American wildlife, Ungulate, Ungulates, wildlife, Grassland, Grasslands, Plain, Plains, Prairie, Prairies, North America, Yellowstone River, thermal, thermal feature, FUMAROLES, steam, Yellowstone, Yellowstone National Park, United States, U.S.A., Herd, Herds, fall, autumn, Horizontal, scenic, photo, photos, photograph, photographs, image, images, picture, pictures, stock, of, agency, leesonphoto