The Rock Vole, Microtus chrotorrhinus, is a medium-sized vole found in eastern North America. It is also called the Yellow-nosed Vole.
These animals are similar in appearance to the larger Taiga Vole. They have short ears and a long tail which is paler underneath. Their fur is greyish brown with grey underparts and a yellowish nose. They are 15 cm long with a 5 cm tail and weigh about 39 g.
They are found on moist rocky slopes in eastern Canada and the northeastern United States. They make runways through the surface growth and shallow underground burrows. They are usually found in small colonies.
They feed on grasses, mosses, underground fungi and berries (especially Bunchberry ), also sometimes caterpillars. Predators include hawks, owls, snakes and small carnivorous mammals.
The female vole has 2 or 3 litters of 4 to 7 young.
They are active year-round, mainly during the day.
These animals are rarely seen. They have been designated as a species of concern in some parts of its range.