Ключевые слова: american bison, animal, biosphere, bison, bison bison, bison bonasus, bonasus, brown, browsing animals, buffalo, bull, bull buffalo, cow, endangered, fauna, feeding, grass, grassland, grazing, green, head, herd, horn, horns, hump, landscape, large, male, mammal, montana, national, natural, nature, north america, park, prairie, reserve, scenic, spring, summer, us, usa, wild, wilderness, wildlife, wisent, wood bison,