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, ...

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 ...

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 ...

The two wolves were members of the Beyem Seyo pack that in 2025 killed or injured at least 92 calves and cows in a ...

The U.S. Fish and Wildlife Service is threatening to take over Colorado’s wolf restoration program from Colorado Parks and Wildlife. Brian Nesvik, the federal agency’s director, sent a letter on Dec.

At the surface, Colorado’s wolf program can appear rife with conflict. However, many Coloradans are working to bridge gaps ...