Wolf Pups Seen in the Wild | Expedition Wolf | BBC Earth

An experienced tracker makes an incredible discovery in a seemingly uninhabited meadow. Once shot to the brink of extinction, wild wolves are now returning to the United States with a vengeance. They are crossing the Canadian border and tension is mounting. A team of biologists track down these top predators to find out if there's something special about these wolves that's helping them to survive. It's a difficult mission in an unforgiving mountain landscape and the team must struggle through snow covered forests, along ancient paths and through long forgotten valleys.