Buck Bull Elk herd Colorado Yellowstone National Park Montana Wyoming Idaho wildlife animals sunset winter eating grass open snow meadow males deer Denver front range backcountry buck hunter still

elk elk heard buck colorado drone antlers deer bull montana wyoming yellowstone evergreen denver wildlife animals yearling calf winter snow grass mountains peaks rocky mountains hunt hunter buck hunter snowy sunset afternoon morning walking eating grazing cinematic vail wilderness open space conifer idaho usa mount blue sky mount evans cows small herds spring autumn wintery raising calves spring time