An American Bison stands in its grassland habitat, surrounded by the thermal features of Yellowstone's geyser filled caldera.

American Bison, American Buffalo, Bison bison, Bull, Adult, Mature, Male, Grassland, Prairie, Thermal Features, Geysers, Steamvents, Fumeroles, Caldera, Yellowstone National Park, Wyoming, Wyo, WY, United States, USA, Photography, Photograph, Photo, Picture, Image, Fine Art Prints, Stock, For Sale, Purchase, Publication, Magazines, Advertising, Kari Post