黄石国家公园的美洲野牛，怀俄明州，美国

grass outdoor sky field savanna animal landscape sunrise ecoregion mammal nature sunset mountain steppe deer antelope distance safari wildlife terrestrial animal grazing herd group prairie grassy clouds pasture plant desert camel plain background cloud elephant standing green cattle lush bovine day dry open wild giraffe wild dog elephants and mammoths african elephant indian elephant asian elephant tusk antler reindeer elk cow sun bull several mist tree morning fog shrubland tundra horizon natural environment grassland wilderness national park highland tall brown fawn roe deer llama kangaroo white-tailed deer black tailed deer