Oklahoma’s occurrence databases hold 368 records of the brush mouse, all logged through GBIF, with reports concentrated around Wichita Mountains Wildlife Refuge, Ouachita National Forest, and Tallgrass Prairie Preserve. That count shows where the species has been documented, not how many actually live across the state.
A western mouse at the edge of its range
The brush mouse is a species of the West and south-central states, thick across California, New Mexico, Arizona, and Utah, and thinning fast as its range reaches into Texas, Colorado, and finally Oklahoma at the eastern margin. That places Oklahoma at a genuine range edge rather than in the core of the species’ distribution, and it explains why records here run so much sparser than in the mouse’s western strongholds.
Rock and oak, not open prairie
Brush mice favor chaparral, oak woodland, pinyon-juniper edges, and rocky canyons, habitat with enough broken rock, roots, and low woody cover for a mouse to climb and vanish into. Wichita Mountains Wildlife Refuge, with its granite boulder fields and oak-shrub thickets, is about as close as Oklahoma gets to that structure, and it’s likely the anchor for most of Oklahoma’s records of this species. The wooded Ouachitas and the state’s tallgrass prairie country offer a very different structure, dense hardwood canopy in one case and open grassland in the other, neither of which matches the rocky, brushy slopes this species actually favors.
Status in Oklahoma
NatureServe hasn’t assigned the brush mouse a ranked status in Oklahoma; it’s currently unranked (SNR) in the state, with a global rank of G5. It isn’t listed as nonindigenous by USGS NAS and is native to its Oklahoma range.
Full species profile
