A new clip out of Yellowstone offers a rare look at the brutal reality of kleptoparasitism in the backcountry. Watch a pack ...

You mess with the calf, you get the herd. It's estimated that around 4,500 bison roam around Yellowstone National Park.

The roars of a grizzly echoed from a riverbank in Yellowstone National Park on Sunday, as it postured with a wolf over a ...

Wolf and grizzly bear sightings are fairly common in Yellowstone. But scenes such as these, illustrating the life-or-death ...

Yellowstone visitors were lucky enough to witness a rare interaction between two of the park's most iconic predators.

Once the bear reached the area where the wolves were, the wolves must’ve smelled him ... then all chaos broke out.” ...

Wolf recovery milestone: Colorado reports at least 32 gray wolves, with strong pup recruitment signaling biological success in the third year of reintroduction. Bison grazing dispute: A federal ...

WARSAW, Poland (AP) — A pack of wolves in eastern Poland made a wrong choice of prey when it tried to attack a herd of bison, but was dismally chased away. An online camera installed by state forestry ...