California’s wolf population is showing signs of inbreeding as isolated animals pair up to preserve their lineage.
According to California Wolf Watch, nearly one in four wolves in the state was born to sibling parents from Northern California’s Whaleback Pack.
The organization said the first confirmed inbred pack recorded in California in 2026 was the Ashpan Pack. Female wolf WHA29F, also known as CA124, was born to the Whaleback Pack in 2024. She later had five pups with WHA07M, or CA051, a black male born to the same pack in 2021.
“The second confirmed pack identified with inbreeding in California in 2026 was the Ice Cave Pack,” California Wolf Watch said.
Records from the California Department of Fish and Wildlife (CDFW), published under the title “California’s Known Wolves,” also document inbreeding among the state’s wolves. The agency’s data identifies the Beyem Seyo and Ashcan packs among the groups involved.
Even with inbreeding reported in roughly a quarter of California’s wolves, a state wildlife official said the trend is not currently cause for alarm.
“At this point, I would not characterize inbreeding as an immediate threat to the viability of California’s wolf population,” CDFW gray wolf expert Axel Hunnicutt told KTLA 5.
Hunnicutt noted that California’s wolves remain part of a broader western population. Wolves continue moving into the state from Oregon, where they can mate with animals from different genetic lineages. “We continue to document that gene flow annually,” she said.
Although inbreeding is uncommon among established wolf populations, it can occur in smaller groups that are geographically isolated and have fewer potential mates.
Wolves are not the only animals to experience this problem. Cheetahs, whose numbers have fallen dramatically, have also turned to inbreeding as their populations neared extinction.
“Cheetahs (Acinonyx jubatus) have faced extinction at least two times in the past after their populations were reduced, leading to inbreeding,” National Geographic reported.