Indiana’s 127 prairie vole records mark the eastern front of a grassland animal’s range, and they haven’t been refreshed lately: the newest verified report dates to September 2018. The pattern they draw hugs the state’s western and southern counties, from Posey at the Wabash’s mouth around to Jefferson on the Ohio River, which fits a vole that came in with the tallgrass and never took to the eastern woods.
Runway country
You rarely see a prairie vole so much as its handiwork: narrow, clipped runways threaded through dense grass, with little piles of cut stems alongside. Posey County in the southwest corner leads the state with 27 records, and the suggested viewing ground reads like a tour of Indiana’s remaining big grass: Kankakee Sands, a working prairie restoration in the northwest, plus the dunes and the wet meadows of the Kankakee lowland. Any old field or ungrazed meadow with a thick thatch can hold a colony, which is why records turn up in 29 counties even at the range’s edge.
Two humps on the calendar
Indiana reports crest twice, in August and again in October, and that double peak likely tracks real vole biology. Colonies breed from spring into fall, so their numbers build all season and reach their highest point just as the first frosts hit, when fresh runways are also easiest to spot in browning grass. Voles don’t hibernate, so the winter lull in reports says more about observers than animals.
Status in Indiana
NatureServe ranks the prairie vole S5, secure, in Indiana, and it’s a native resident, not a newcomer. Even so, a species last verified in the state in 2018 could use fresh eyes: a documented sighting from any of those western counties would confirm this pair-bonding little grassland rodent is still going about its business at the edge of its range.
Full species profile
