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, ...

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 ...

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 ...

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 ...

Up until the mid-1990s, the ecosystem of Yellowstone National Park had turned into a gloomy, barren land, overgrazed and overpopulated by elk. But ever since wolves were reintroduced in the park, the ...

The author writes, “When the US Fish and Wildlife Service reintroduced 14 gray wolves to Yellowstone National Park in 1995, the animals were, in some ways, stepping into a new world. After humans ...

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 ...

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