Oklahoma’s occurrence databases hold just 39 records for the western harvest mouse, among the thinnest of any mapped Oklahoma mammal. The state sits at the eastern edge of a range centered much further west, in California, New Mexico, and Colorado.
A western grassland mouse at its eastern limit
This mouse belongs to dense grass and weedy cover across prairies, marsh edges, farmland, and desert grassland, habitat that in Oklahoma is most available in the mixed-grass country of the western High Plains and Panhandle. Records elsewhere in the state, including any near Salt Plains National Wildlife Refuge, Red Slough Wildlife Management Area, or Lake Thunderbird State Park, likely mark the scattered eastern fringe of where the species can turn up rather than a real stronghold.
Runways through grass, not across open ground
Grooved upper front teeth mark this mouse as a harvest mouse rather than a house mouse or vole. It builds woven runways through standing grass and climbs stems to reach seed heads, rarely crossing exposed ground where it would be an easy target for predators. With so few Oklahoma records, the timing of its activity here isn’t well documented.
Status in Oklahoma
NatureServe ranks this species S3, Vulnerable, in Oklahoma, in keeping with how thin and scattered its records are at this edge of its range, and it’s native to Oklahoma.
Full species profile
