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Wolves in Yellowstone National Park have experienced a 27% decline in population in 2025.

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 ...

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 ...

The Yellowstone bubble Wolf 1331F’s fate was unusual only in that she made it so far north. When wolves leave the park, they die — often, quickly. Yellowstone’s roughly 100 wolves are among the most ...

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 ...

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, ...