a herd of european bison grazing on the field.five large brown aurochs bison bonasus on the birch forest background. five bull

animal antler artiodactyla auroch aurochs background belarus bialowieza birch bison bizon bonasus bovidae bovinae brown buffalo bull bulls cold europe european fauna field fieldfive five forest grass grazing head heavy herd horn horned horns landscape large looking male mammal meadow national nature outdoor park poland portrait power reserve reservebelaruspoland snow standing wild wilderness wildlife with