Mule Deer, Black-tailed Deer (Odocoileus hemionus), buck in snow fall, Rocky Mountain National Park, Colorado, USA

america american animal animals artiodactyla black black tailed buck capreolinae cervidae colorado day daylight daytime deer deers during even even toed exterior exteriors fall fauna hemionus in kingdom mammal mammalia mammalian mammalians mammals mountain mule national nature new nobody north odocoileus of outdoor park photo photos rocky ruminant ruminantia ruminants shot shots snow states tailed tetrapod the toed toed ungulate ungulates united us us american usa vertebrata vertebrate vertebrates wild wildlife world world