European bison in the forest of Bialowieca national park, Poland at winter

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