"Sagebrush Voles usually live in colonies in semiarid, partly brushy habitat. The dominant plants where they live are sagebrush or rabbitbrush mixed with bunchgrass. A colony's network of burrows may have 8 to 30 entrances and interconnecting tunnels, which are often paved with grass or sage clippings. Sagebrush Voles eat a wide variety of fresh green vegetation. Unlike other rodents that live in dry habitats, they do not eat seeds or keep food stores. They are active year-round, at any time of day or night, but windy weather drives them belowground."
Links:Mammal Species of the World
Original description: Cope, E.D., 1868. Proceedings of the Academy of Natural Sciences of Philadelphia, 20:2.