Investigation began after the wolf's research collar was found in a tree.

If a wolf pack can bring down a bison, or locate a dead or dying bison, the carcass can sustain the pack for days.

Another wolf from Yellowstone National Park's famous Junction Butte Pack killed in Montana is being investigated as a ...

Yellowstone officials once watched 907 and the Junction Butte Pack endure 12 days without finding anything to eat – only for the pack to triumphantly bring down a bull elk on empty stomachs. When it ...

Thirty years ago, park rangers reintroduced grey wolves into Yellowstone National Park. They wanted to restore the ecosystem and get the elk population, which had decimated the plant community, in ...

Thirty years ago, park rangers reintroduced grey wolves into Yellowstone National Park. They wanted to restore the ecosystem and get the elk population, which had decimated the plant community, in ...