Cougars were also found to be moving where they hunt and travel. They avoid areas where wolves hang out. They avoid wolf ...

Thirty years ago, park rangers reintroduced grey wolves into Yellowstone National Park. They wanted to restore the ecosystem and get the elk... How the wolf changed Yellowstone 30 years after ...

A new study documents the complex interactions between cougars and gray wolves in Yellowstone National Park and finds their ...

Researchers installed cameras in the US national park to monitor cougar density and abundance – and to see how these apex ...

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

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, ...