A virus outbreak hit Yellowstone wolf pups hard in 2025.

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 ...

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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 ...

This valley in northeastern Yellowstone is home to a number of notable wolf packs. Embark on a tour or head out on your own ...

A prominent wolf that lived among Yellowstone's most famous wolf pack is believed to have been illegally shot and killed just outside the park last month, according to wildlife experts. The wolf was ...

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

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 ...