American Bison (Bison bison) in change of coat from winter to summer

american animal animals artiodactyla bison bison bisons bovid bovidae bovids bovinae bovine bovines bovini buffalo buffaloes buffalos change coat day daylight daytime during even even toed exterior exteriors fauna from in kingdom mammal mammalia mammalian mammalians mammals nature nobody of outdoor photo photos ruminant ruminantia ruminants shot shots summer tetrapod the to toed toed ungulate ungulates vertebrata vertebrate vertebrates wild wildlife winter world