The desert woodrat is one of Colorado’s scarcer rodents. Open occurrence databases hold only 29 records for it in Colorado, nearly all of them museum and survey specimens rather than field photographs, which fits a small, strictly nocturnal packrat living at the far northeastern edge of its desert range.
A desert species at its range edge
This is a rodent of hot, dry, rocky ground, and in Colorado that country is confined to the western canyons and shrub valleys. Almost every record comes from Mesa County and the Grand Valley, with a thin scatter north into Rio Blanco and Moffat, where sagebrush, saltbush, and broken rimrock give the woodrat the cover and cactus it depends on. Beyond that arid pocket the state turns too cool and wet for it, so its narrow footprint here is genuine rather than merely a gap in surveying.
The packrat’s den
Like its relatives, the desert woodrat piles a den of sticks, cactus joints, and gathered debris into a rock crevice or under a shrub, and it defends that fortress for life. It forages after dark on leaves and green shoots, drawing much of its water straight from the plants it eats. The stick-and-cactus middens it leaves can persist for years, hardening into a record of the vegetation that once grew nearby.
Status in Colorado
NatureServe ranks the desert woodrat S2, imperiled, in Colorado, a reflection of how little suitable desert habitat the state holds. It stays native and secure across its broader Southwest range, but here it clings to the driest western corner.
Full species profile
