Montana’s occurrence databases hold just 103 records of the southern red-backed vole, one of the sparser counts in this survey. That’s less about true scarcity than about how small, secretive, and hard to tell apart from other small rodents this vole is on the forest floor.
A vole tied to damp, decaying forest floor
This vole doesn’t range widely across Montana’s landscape the way a deer or an elk might; it sticks to the cool, moist floor of coniferous and mixed forest, especially where downed logs, thick moss, and deep leaf litter build up in the shaded valleys and high timber west of the Continental Divide. Clearcuts, dry grassland, and open range hold almost none of them. Where the forest floor stays damp and undisturbed, the vole tunnels through the litter and under rotting wood, rarely showing itself in the open.
An unlikely partner for the trees around it
Fungi, not seeds or greens, make up a surprising share of this vole’s diet. It digs up and eats the underground fruiting bodies of fungi that live in a nutrient-sharing partnership with conifer roots, and its droppings scatter viable spores across the forest floor as it moves. A vole feeding on a rotting log in a Custer-Gallatin spruce stand is, in a small way, helping reseed the fungal network the surrounding trees depend on.
Status in Montana
The vole is native across its Montana range, and NatureServe ranks it S5, secure. Its numbers track the health of old, moist conifer forest more directly than almost any broader measure, since that damp, litter-rich floor is the only place it can make a living.
Full species profile
