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 ...

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

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

A brave bison mother protects her newborn calf from an attacking wolf pack until the rest of the herd arrives to aid in the ...

A photographer has captured a strikingly graphic image that reveals the raw dynamics at play during winter in Yellowstone National Park. From Big Sky Wildlife, aka Scott Brovsky, via Instagram on Jan.

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 ...

A 2,600km² exclusion zone was established following the world's worst civilian nuclear accident at Chernobyl in 1986, which released a radioactive cloud across Europe and led to the evacuation of ...

Jerod Merkle remembers helping to capture a collared mule deer in Wyoming’s Red Desert a few years ago when the ground was bare of snow. A wildlife ecologist and associate professor at the University ...