Caribou, rangifer tarandus. Male/ bull in tundra; usa, alaska (alaska range in background) .

horizontals warm rangifer caribou mammal mammals animals horizontal adult deer endotherm male artiodactyla adults warm blooded range fall vertebrate mature fauna bull alaska wildlife vertebrates mammilia usa tarandus zoology cervidae vertebrates ungulate tundra portraits herbivores portrait toed even herbivore blooded herbivorous nature ungulates endothermic vertebrate hoofed animal herbivora 1030 11945