Male Elk with Large Antlers Stands Watches his Herd While Grazing On The Grassfield At Rocky Mountain National Park In Colorado, USA

cervus canadensis elk wapiti elks wildlife cervus grazers antlers mammals deer horned fauna cervidae national park horn animals ruminant canadensis herd adult grassland group nat geo male colorado rocky mountain bull national geographic standing hunt habitat wild large short tail watching wilderness native meadow pointer herbivore behavior big grassfield chew field grass park natural life