Colorado Parks and Wildlife confirmed the death of the fourth gray wolf this year. Officials said the female gray wolf, 2512-BC, died in northwest Colorado on May 15. The U.S. Fish and Wildlife Service is investigating her death.

A female gray wolf was reported dead in northwest Colorado this week, becoming at least the seventh of the state’s reintroduced wolves to die. Colorado Parks and Wildlife did not indicate in its news release what may have caused the animal’s death but said a final determination will be made after a necropsy.

A fourth gray wolf that was brought to Colorado from Canada as part of the state's reintroduction program has died, Colorado and federal officials confirmed on Friday morning.