Bull Elk buck winter Colorado Yellowstone National Park Montana Wyoming Idaho wildlife animals sunset winter walking open snowy meadow herd of males deer Denver front range backcountry buck hunter pan

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