Nearly a quarter of the wolves currently in California are the result of incestuous pairings, primarily from the Whaleback Pack in the northern part of the state, according to California Wolf Watch. This phenomenon has led to the formation of new packs with inbred members.
The Ashpan Pack was the first confirmed pack in California to exhibit inbreeding in 2026. A female wolf from the Whaleback Pack, known as WHA29F or CA124, who was born in 2024, produced five pups with a male wolf from the same pack, WHA07M or CA051, a black male born in 2021. The Ice Cave Pack was identified as the second confirmed pack with inbreeding in 2026.
Data from the California Department of Fish and Wildlife (CDFW), listed under "California's Known Wolves," also indicates inbreeding within the Beyem Seyo and Ashcan packs.
Despite these findings, Axel Hunnicutt, a gray wolf expert at CDFW, expressed that inbreeding does not pose an immediate threat to the wolf population in California. "California wolves remain connected to the larger western wolf population, and wolves continue to disperse into California from Oregon and breed with animals representing different genetic lineages. We continue to document that gene flow annually," Hunnicutt stated.
While inbreeding is uncommon among established wolf populations, it is not unusual for small and isolated groups. This situation has been observed in other species facing near-extinction, such as cheetahs, which have undergone periods of inbreeding due to critically reduced populations in the past.
