Stock photography, photos: european bison Stock photos of european bison at Barcelona's Zoo Photograph: © Xavier Deltell Click for a larger image and more information Keywords associated with this stock photo: Animal, beast, bestial, world, life, nature, fauna, four, legged, quadruped, mammals, mammalia, biology, fauna, European, bison, aurochs, hoof, hoofed, ungulate, horned, hair, fur, calf, Bos, Bison, vertical , captivity, europe, spain, barcelona, zoo, preserve, extinction