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

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