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 ...

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

A grizzly bear and wolf were filmed in a tense standoff over a bison carcass in Yellowstone National Park’s LeHardys Rapids, captivating visitors and wildlife watchers. While both predators postured ...

A raw display of power and determination was witnessed by Yellowstone tourists Monday as a wolf battled a much larger grizzly ...

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 ...

A new study shows that interactions between wolves and cougars in Yellowstone National Park are driven by wolves stealing prey killed by cougars and that shifts in cougar diets to smaller prey help ...