Grouo of three wild european bison in the forest of Bialowieca national park, Poland at winter

buffalo wisent european bison bison bison bonasus grazing bialowieza national park ruminant bull herd wildlife rewilding bialowieza snow artiodactyla winter animal hervivore cold bovidae reintroduction horn zubr protected national park poland group nature mammal horns wild large extinct forest largest grass brown storm bonasus outdoor endangered male european team close biaowieza drove danger polish symbol