Two-thirds of Minnesota’s 90 prairie vole records come from one county. Sherburne County’s 60 reports sit on the Anoka Sand Plain, where dry, sandy prairie and savanna give this grass-loving vole the thick turf it needs, and where refuge biologists have run enough small-mammal surveys to prove it. Records measure search effort as much as voles, but the second cluster argues the pattern is real: Winona County, far to the southeast in the Mississippi bluff country, adds 20.
Prairie at the northern limit
Minnesota is the northern edge of the prairie vole’s range, and the suggested viewing ground shows where the state still keeps its grass: Agassiz and Tamarac national wildlife refuges in the northwest, Rice Lake in the center. The vole doesn’t need true tallgrass, though. It thrives in any rank, ungrazed cover, from old fields to marsh edges to grassy roadsides, which is how it turns up in a metro county like Hennepin as readily as on a refuge.
An April wall of reports
Almost half of Minnesota’s records, 47 of 90, landed in April. Prairie voles stay active under the snow all winter, so April isn’t an emergence so much as a convergence: the snow melts, winter-killed grass lays flat to reveal runway networks, and spring traplines go out all at once. Read the spike as the month when vole sign and survey effort meet.
Status in Minnesota
NatureServe ranks the species S3, vulnerable, in Minnesota despite its secure global standing, a common grade for an animal at the cold edge of its range. It’s native here, and the state’s remaining dry prairie is fragmented enough that each occupied site matters. A record from a new sand-plain county would be genuinely useful news, not just another dot.
Full species profile
