Lassen Pack Has Two Litters of Pups

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Tuesday, November 10th, 2020

Two females in the Lassen Pack had litters this spring, bringing the total of pups to a minimum of nine. LAS01F, the original matriarch of the family birthed at least five and LAS09F, her two-year old daughter had up to four. The new alpha male, who joined the pack last year, sired both litters. The origin of the black male is yet unknown. While multiple litters are uncommon, they most often happen when a genetically unrelated adult wolf joins a new pack.

LAS09 waking up from being captured and collared in June 2020. Photo by CA Department of Fish and Wildlife.

There is now only one collared wolf in California, LAS09 the two-year-old breeding female of the pack. The yearling male LAS13M, collared this summer, began to disperse from the pack in August. He spent a few weeks about 20 miles from his pack then traveled to Modoc County in late September. In early October he entered into Oregon.

This is the fourth litter of pups for LAS01F. Her first litter of four was in 2017, with five in 2018 and four in 2019. Currently the pack consists of three adults, three yearlings and nine pups, bringing the Lassen pack to fifteen.