The sagebrush vole is thinly documented in Colorado. Open occurrence databases hold only 73 records for it, with 2 coming from iNaturalist photos. The rest are museum specimens, the standard evidence for a small pale vole that lives out of sight in dense brush.
Tied to the sagebrush of northwest Colorado
This vole is a sagebrush obligate, and Colorado sits at the southeastern edge of a range centered on the Great Basin. Its records cluster in the sage flats of the northwest, with the strongest showing in Moffat County and scattered outliers eastward. Where the big basin sagebrush thins out, so does the vole; it needs that specific cover for food and shelter, which keeps it off the plains and out of the forested high country.
Colonial and awake all winter
Unlike many small mammals here, the sagebrush vole does not hibernate. It stays active year-round in loose colonies, cutting shallow runways through the vegetation and clipping green sage and grasses even under snow. Its pale, grizzled coat blends into the dry stems, and its habits keep it hidden, so the animal is far more often trapped than seen.
A state-imperiled specialist
NatureServe ranks the sagebrush vole S1, critically imperiled in Colorado, even though the IUCN considers it globally secure and least concern. That gap reflects how little of the state offers the intact sagebrush it depends on. Colorado National Monument, Grand Mesa National Forest, and Black Canyon of the Gunnison National Park lie within its broad western range, but this is a specialist whose foothold in the state is genuinely narrow.
Full species profile
