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 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 ...

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

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

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 ...

Lang has a close-up view of one of the most dramatic and contentious wildlife experiments in a century—the reintroduction of wolves to the northern Rocky Mountains, where they were wiped out long ago.

Colorado passed a wolf reintroduction plan in November 2020, and 10 wolves were reintroduced into the state in December 2023. Opponents are now trying to stop this reintroduction plan, the Denver Post ...

Colorado voters’ opinions on wolf reintroduction in the state haven’t changed much since the effort was narrowly approved in a 2020 ballot measure, according to the results of a 2025 voter opinion ...