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

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, ...

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

A man was caught on video approaching and spraying at a Yellowstone wolf pack. Bystanders shouted warnings. Park officials advise staying at least 100 yards away from wolves. Add this to the list of ...