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 flare up of a disease that’s especially lethal to wolf pups took a toll on Wyoming and Yellowstone National Park wolf ...

Detailed weight data on wolves near Yellowstone reveals that Wyoming's wolves seem to weigh much more than gray wolves in other parts of the Lower 48. Here's why ...

Few animals symbolize wild interconnectedness quite like wolves, whose return helped reveal just how tightly ecosystems are woven together.

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 ...

Wyoming wolves are stout compared to some other Lower 48 subpopulations, and the reason why they tend to run hefty is ...

A flare up of a disease that’s especially lethal to wolf pups took a toll on Wyoming and Yellowstone National Park wolf numbers in 2025, reducing biologists’ counts to a level last seen when wolves ...