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

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

Despite distemper-driven decline, most remaining canines now have strong antibodies and resistance — and state biologists are ...

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

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

Sharing is not caring at Yellowstone National Park... in fact, it doesn't appear like it's even an option. Most people would ...

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

The day after two hikers were mauled by a grizzly in Yellowstone, tourists yelled at rangers who were warning them to ...

Visitors and photographers in Yellowstone National Park recently captured rare footage of grizzly bears and wolves clashing over a drowned bison carcass in the Yellowstone River. Experts say such ...

Yellowstone National Park is nature's Thunderdome from the Mad Max series. It's a full-on fight to the death among America's ...

A big thank-you to Jim Vacca for his important and eloquent essay on Colorado’s gray wolf reintroduction program. Having just ...