Wolves usually rely on cooperation to survive. Hunting large prey such as elk typically involves multiple pack members working together to isolate and exhaust an animal. That reality makes one ...

A new scientific review challenges the headline-grabbing claim that Yellowstone’s returning wolves triggered one of the strongest trophic cascades on Earth. Researchers found that the reported 1,500% ...

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 ...

Thirty years ago, park rangers reintroduced grey wolves into Yellowstone National Park. They wanted to restore the ecosystem and get the elk... What is the legacy of Yellowstone wolves 30 years after ...

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, ...

Add Yahoo as a preferred source to see more of our stories on Google. On four separate occasions, Wolf 907F seized power as the alpha female leader of the Junction Butte Pack in Yellowstone National ...

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

This winter saw the most wolves from Yellowstone National Park killed in about a century. That's because states neighboring the park changed hunting rules in an effort to reduce the animals' numbers.

Researchers installed cameras in the US national park to monitor cougar density and abundance – and to see how these apex predators interact with other species, such as wolves.

When gray wolves returned to Yellowstone National Park, the public heard a simple story: predators came back, balance ...