The southern red-backed vole is one of the least-recorded mammals in this batch, with 808 Massachusetts records and a rank near the bottom of the state’s mammal list. That’s likely a real signal here, not just a gap in reporting. Massachusetts sits near the warm southern edge of a species that’s much more at home in the cooler forests of northern New England and Canada.
A cool-forest specialist at the edge of its range
Nearly every Massachusetts record for this vole comes from the higher, cooler ground in the state, the spruce-fir and hemlock stands near the top of Mount Greylock and the large, unbroken forest block protecting the Quabbin Reservoir’s watershed. Both places keep the moist, shaded, downed-log-littered forest floor this species needs, conditions that get scarcer as elevation drops and Massachusetts’s forest turns to warmer oak and hickory.
A vole that eats what the forest floor offers
Unlike the grass-eating voles of open fields, the red-backed vole forages on the forest floor itself, eating fungi, including the underground truffles many trees rely on for nutrient uptake, along with seeds, berries, and green shoots. That diet ties the species tightly to old, undisturbed forest litter rather than the mowed fields and marsh edges other Massachusetts small mammals use.
Summer records, tied to when the surveys happen
Reports peak sharply in July and August, largely because live-trapping surveys, the main way this secretive vole gets recorded at all, run during the warm field season rather than because the species itself is more active then.
Status in Massachusetts
NatureServe ranks the southern red-backed vole S5, secure, and it’s native to the state. Its low record count in Massachusetts fits its position at the southern, low-elevation edge of a range centered much farther north, not any real decline in the cool, high forest it still holds onto here.
Full species profile
