Adult, American Bison, Animal, Bison, Bison bison, Bison bison bison, Bison sp, Bovid, Bovidae, Color Photograph, Day, Even-toed Ungulate, Female, Frost, Head and Shoulders, Looking, Looking at Camera, Mammal, Montana, National Park, Near Threatened, Near Threatened Species, Nobody, North America, One Animal, Outdoors, Plains Bison, Portrait, Side View, Snow, U.S. National Park, USA, Ungulate, United States, United States of America, Vertical, Wildlife, Winter, Yellowstone National Park