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 ...

In Yellowstone National Park — where gray wolves were reintroduced starting in 1995 — researchers have gone back and forth on whether the restoration of wolves has impacted the ecosystem. The idea is ...

A new study reveals the profound ecological effects of wolves and other large carnivores in Yellowstone National Park, showcasing the cascading effects predators can have on ecosystems. In Yellowstone ...

A gray wolf at the Wildlife Science Center in Forest Lake, Minn. Colorado is going to be reintroducing gray wolves. (Dawn Villella/Associated Press) Ecosystems in the Northwest were heavily shaped by ...

Researchers with Colorado State University spent two decades studying the ecosystems in Yellowstone National Park, with the goal of learning whether or not the reintroduction of wolves had any rapid ...

The historic removal of gray wolves from the U.S. West facilitated the rise of mid-ranking predators across the region, wreaking havoc on historical ecosystem dynamics, a new study has found. Yet just ...

When gray wolves returned to Yellowstone National Park, the public heard a simple story: predators came back, balance returned, and the whole ecosystem changed. That narrative held that elk numbers ...