largest wolf packs
25 Wolves Chase Down Bison: One Of The Largest Wolf Packs Ever Filmed. This video is the first of its kind. A pack of northern gray wolves â at 25 members strong, one of the largest wolf packs ever filmed â chases down a herd of wood bison, the largest land animals in North America. This scene from the upcoming Frozen Planet series was filmed in Wood Buffalo National Park in Canadaâs Northwest Territories at the height of the Arctic winter.