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.

Scientists debunk decades-long study claiming wolves' reintroduction triggered a dramatic transformation in Yellowstone.

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 ...

At the age of 11 years, 9 months, Wolf 1090F has earned the title of the oldest living wolf in Yellowstone, which is ...

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 ...

Now, the researchers at Yellowstone National Park want to learn wolf language beyond what has been fed to us through ...

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 ...

This is the first story in a two-part series recapping Colorado’s second year of wolf reintroduction.  Colorado’s wolf ...

Across North America, mountain lions, bears and gray wolves have made a remarkable comeback over the last 50 years. Once nearly exterminated, these animals have been recovering their populations and ...