Townsend’s ground squirrel is a shrub-steppe animal, and Washington’s record shows it in the cleanest possible way. Of 261 state reports, 129 come from Benton County and 92 from Yakima, with Kittitas adding 37. All of it sits in the dry Columbia Basin and Yakima Valley. The Wenas Wildlife Area, classic sagebrush and bunchgrass ground, is the most reported named site, and the record west of the Cascade crest is essentially blank, because the habitat is.
The seasonal window is short and telling. Reports begin in March, surge to a May crest of 135, and end almost entirely by June, because these squirrels retreat underground to escape the summer drought and don’t reappear until the following spring. Read in that light, the May peak is genuine biology rather than a visitation artifact. The IUCN lists the species as Vulnerable and NatureServe calls it vulnerable in the state, and the record fits the concern: a narrow, dry-country range concentrated in a handful of counties east of the mountains.
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