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

A recently published study that utilized GPS collar data collected over nine years found that interactions between wolves and ...

Add Yahoo as a preferred source to see more of our stories on Google. A wolf carries a very young pup by its hindquarters in this image caught by a game camera. A new study shows that contrary to long ...

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

Large carnivores are both clashing and coexisting in the western United States. Although wolves dominate cougars and steal their prey, cougars' shift from elk- to deer-heavy diets, paired with a ...

A new study shows that interactions between wolves and cougars in Yellowstone National Park are driven by wolves stealing prey killed by cougars and that shifts in cougar diets to smaller prey help ...

In a new study, a UC Berkeley-led team of biologists observed gray wolves near Yellowstone National Park traveling 20 kilometers or more over rugged, mountainous terrain, with very young pups in tow.

Scientific research has long assumed gray wolves are non-migratory during springtime, staying anchored to tend to litters of nearly helpless pups. For the first weeks of life, after all, pups are ...