Suzi Eszterhas / American Bison (Bison bison) cow and calf playing, Yellowstone National Park, Montana

Shin Yoshino / American Bison (Bison bison) two males fighting, Yellowstone National Park, Wyoming

Sumio Harada / American Bison (Bison bison) female and calf dust bathing, Yellowstone National Park, Wyoming

Yva Momatiuk & John Eastcott / American Bison (Bison bison) herd near river, Yellowstone National Park, Wyoming