Herd Of Female Elk With Head Male Elk Protecting While Lying In The Ground At Rocky Mountain National Park in a Grass Field

wapiti elk cervus canadensis herd wildlife grassland cervus fauna antlers ruminant group horned cervidae national geographic nat geo colorado feeding rocky mountain hunt conservation wild canadensis short tail meadow herbivore wilderness grass bull environment grassfield protect chew habitat eating field national pointer cow head behavior ground male laying lying natural alpha female park munch