European bisons.

Żubry czyli po zagranicznemu bizony europejskie (European Bisons),  można podglądać na żywo przy pomocy kamery internetowej. prosto z Białowieży
http://www.lasy.gov.pl/informacje/kampanie_i_akcje/zubryonline

Zazwyczaj przychodzą po zmroku, ale czasami i w dzień.

Conserving bison is not just about protecting a national symbol of Poland; it is linked to the survival of Europe's last primeval forest, the 8,000-year-old Bialowieza, which straddles the border with Belarus. Around 16% of the Polish part of the forest is a national park and home to about 470 of the animals.
The bison is Europe's heaviest land mammal, weighing up to 800kg. They are naturally shy – and experts want to keep it that way – but it is possible to see them.
Read more:http://www.theguardian.com/travel/2011/apr/09/poland-wildlifeholidays