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

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

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

A brave bison mother protects her newborn calf from an attacking wolf pack until the rest of the herd arrives to aid in the defense. #Wildlife #Nature #Bison #AnimalBehavior ...

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

Yellowstone National Park visitors recently had a front row seat to watch a pack of wolves hunting a herd of bison, leaving ...

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

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 ...