winter image with four aurochs or bison bonasus, the last representative of wild bulls in europe. european endangered artiodactyl

america american artiodactyl auroch aurochs beast bialowieza bison bonasus bovidae bovinae breeding brown buffalo bull bulls chaps cold cow endangered europe european fauna feeding field flock forest gang group habitat head herbivore herd hoof hoofed horn landscape mammal montana national native nature outdoor pasture poland power relict representative reserve russia snow snowy species standing states ungulate united usa wild wilderness wildlife winter wisent wood wyoming yellowstone