A new study shows how wolves steal kills from cougars in Yellowstone, driving an uneven feeding rivalry and changing cougar ...

A new study shows that interactions between wolves and cougars in Yellowstone National Park are driven by wolves stealing ...

These rare kills in Washington State have biologists searching for answers. “Everyone always assumes wolves have the upper ...

Over the last three decades, Yellowstone National Park has undergone an ecological cascade. As elk numbers fell, aspen and willow trees thrived. This, in turn, allowed beaver numbers to increase, ...

As cougar and wolf populations recover, clashes between these top predators are inevitable with cougars finding ways to ...

Previous research on the effect of wolves on the food web has been criticized, raising questions about the predator’s role in the Yellowstone ecosystem. When you purchase through links on our site, we ...

Touching wild animals, especially in National Parks, is both dangerous and illegal. Even so, many people make headlines every year for getting far too close to potentially threatening animals.

In Yellowstone National Park, when a bison dies it’s not long before wolves or grizzly bears move in on the carcass. If one or two wolves are on the carcass, a lone grizzly bear can usually clear them ...