Montane Vole

A vole surrounded by dry leaves
Mountain voles are mammals in Yellowstone National Park.


Black track of a montane vole
Montane vole track

Scientific Name

Microtus montanus


  • 5–7.6 inches long, 1.2–3.2 ounces.
  • Brownish to grayish-brown, occasionally grizzled; ventral side is silvery gray; relatively short tail is bi-colored.


  • Found at all elevations in moist mountain meadows with abundant grass and grassy sage- brush communities; also common in riparian areas.
  • Grass is their primary food.
  • Probably the most important prey species in the park; eaten by coyotes, raptors, grizzly bears, other animals.


  • Active year-round maintaining tunnels in the winter; also dig shallow burrows.
  • Typically breed from mid-February to November; up to four litters of 2–10 young per year.
A wolf standing on a snowy bank near brown grass howls

Home to the largest concentration of mammals in the lower 48 states.


Last updated: October 22, 2020

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Mailing Address:

PO Box 168
Yellowstone National Park, WY 82190-0168



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