The story of wolves in Yellowstone National Park is one of the most successful—and scrutinized—wildlife restoration projects in history. Since their reintroduction in 1995, they have fundamentally ...

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, ...

A new peer-reviewed study reports that claims of a “world-leading” trophic cascade in Yellowstone National Park are not supported, citing problems with the methods used in earlier research. A newly pu ...

A critique from a team led by Utah State University ecologist Dan MacNulty and published in Forest Ecology and Management has prompted a formal correction to a high-profile study on aspen recovery ...

A new analysis challenges one of the most publicized claims about Yellowstone's wolves. In a detailed comment published in Global Ecology and Conservation, researchers from Utah State University and ...

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 ...

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 ...

On a chilly October night, rancher Ken Spann watched over his family’s freshly weaned steer calves, a routine practice to keep young calves from breaking through fences in search of their mothers.

Wolf 8 was the smallest of all the male wolves released into Yellowstone and probably was the least likely to become a successful alpha male. When he was a yearling, equivalent to a teenager in human ...