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 ...

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

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, ...

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

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 ...

A look at how wolf policy shifted from eradication to protection, and why wolf conflict is rising again across the West. The ...

Caught in Canada and flown to Yellowstone, 41 wolves were released in the area between 1995 and 1997, restoring the only missing member of the park's native mammals. Since then, wolves have begun ...

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 ...