Previous research on the effect of wolves on the food web has been criticized, raising questions about the predator’s role in the Yellowstone ecosystem.

A grey wolf prowls through Yellowstone National Park near Mammoth Hot Springs in Montana. A group of 66 wolves was reintroduced to Idaho and Yellowstone in the late 1990s. They now total 2,800 ...

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 ...

Now, the researchers at Yellowstone National Park want to learn wolf language beyond what has been fed to us through fictional imitations. Journalist Matt Standal of PBS Montana arrived at the coveted ...

The decision to reintroduce gray wolves in Colorado will be decided by the people, and both sides of the issue say the decision will impact the entire country. “Only in 2020, the weird year that we ...

A plan to import 15 more wolves to Colorado from Canada may violate federal law. Wolves are listed as an endangered species here, so Colorado Parks and Wildlife needs a permit from the U.S. Fish and ...

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.

Five years after Coloradans voted by a razor-thin margin to reintroduce wolves to Colorado, they are right to look at the job state officials and agencies have done and ponder whether this a dog that ...