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

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