Disease outbreak cuts Wyoming, Yellowstone wolf numbers to lowest level since reintroduction era

Disease outbreak cuts Wyoming, Yellowstone wolf numbers to lowest level since reintroduction era

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 were still reestablishing following the species’ historic 1995-96 reintroduction.  Ken Mills, a Wyoming Game and Fish Department large carnivore biologist, uses an antenna to search for collared wolves Feb. 1, 2018, in the Gros Ventre valley east of …