A gray wolf has been found dead in a national park, prompting an investigation into the death of this federally protected species.

A collared gray wolf released in Colorado in January as part of the state’s historic reintroduction effort died in Rocky Mountain National Park this week, wildlife officials said Thursday.

A gray wolf from British Columbia released in January was reported dead April 20 in Rocky Mountain National Park, state wildlife biologists said Thursday night. The U.S. Fish and Wildlife Service