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.

The female gray wolf was part of the group from British Columbia that was relocated to Colorado in January, according to Colorado Parks and Wildlife.

Colorado Parks and Wildlife says two wolves introduced to the state from British Columbia that were shot and killed in Wyoming and a third that was found dead in Rocky Mountain National Park were