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 ...

Learn more about the canine distemper outbreak that could have reduced Yellowstone wolf pup populations to a historic low.

Yellowstone National Park sees millions of tourists every single year, but only a lucky fraction ever get a front-row seat to ...

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, ...

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 ...

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

Colorado’s wolf restoration program is struggling amid federal roadblocks over where the state can source new wolves for reintroduction and the death of a 10th translocated wolf. The latest wolf ...

Despite distemper-driven decline, most remaining canines now have strong antibodies and resistance — and state biologists are ...