The apex predators, restored to the park in 1995, appear to be keeping the local population of plant-eating elk in check, ...

In a new study, a UC Berkeley-led team of biologists observed gray wolves near Yellowstone National Park traveling 20 ...

Gray wolf pups are born helpless—blind, deaf, and without the strong sense of smell that helps adult wolves survive. Normally, these pups stay safe inside their den for at least the first three weeks ...

The reintroduction of large carnivores has initiated a recovery process that had been shut down for decades,” says Painter in a statement.

The National Park Service is clearing up any misconceptions on whether wildlife is migrating away from Yellowstone National ...

YELLOWSTONE NATIONAL PARK, WYO. – Sitting in an old-growth spruce fir forest, Doug Smith says he can see first-hand the impact of reintroducing wolves on the larger ecosystem of Yellowstone ...

For the first time since the 1940s, new aspens have joined the forest canopy in Yellowstone National Park. Researchers say ...

After years of research and observation, scientists have made significant progress, thanks to the unexpected help of one particular animal.

The helicopter was flying low above a remote snow-covered mountain ridge outside Hinton, Alberta, Canada, when pilot Clay ...

Wolves in Yellowstone National Park will sometimes test their predation skills on lone adult bison. But there can be painful consequences. The accompanying footage, captured by Billy Fabian while ...

Yellowstone provides summer habitat for as many as 20,000 elk. The park is also home to more than 100 wolves, which prey on elk, deer, bison, and smaller mammals.

Long before Yellowstone became the world’s first national park in 1872, wolves thrived in the U.S. Rocky Mountains. But early Yellowstone rangers killed off the last of the park’s wolves by 1926.