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

A coyote in Yellowstone was lucky to escape after it got a little too close to a pack of wolves feasting on a bison carcass, ...

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 ...

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