Yellowstone National Park's famous wolf packs are facing an invisible threat that's bringing the number of surviving pups to historic lows: a contagious viral disease called canine distemper. At the ...

In Yellowstone National Park, USA, a herd of bison becomes the target of an 11-member wolf pack during a dramatic hunt. Captured in stunning footage, the wolves utilize teamwork to select a bison and ...

A prominent wolf that lived among Yellowstone's most famous wolf pack is believed to have been illegally shot and killed just outside the park last month, according to wildlife experts. The wolf was ...

Rangers at Yellowstone National Park are reportedly trying to solve the mystery of what happened to a well-known female wolf from one of the area's most famous packs — and the leading theory is that ...