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 ...

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

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, ...

In the heart of Wyoming lies Yellowstone National Park, a sprawling ecosystem that has captivated millions of visitors for centuries. However, its delicate balance faced a near collapse before a ...

A new peer-reviewed study reports that claims of a “world-leading” trophic cascade in Yellowstone National Park are not supported, citing problems with the methods used in earlier research. A newly pu ...

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 ...

Add this to the list of "badly behaved Yellowstone tourists" caught on tape. This wild scene unfolded on Oct. 6, when photographer Keith Allen Kerbs said he was photographing a pack of black wolves at ...