| One of several voles with very small ranges, Gray-tailed Voles live only in lower-elevation grasslands. They do well in agricultural areas. They are excellent swimmers and can often escape flooding that way. Their population density fluctuates quite a lot for reasons that are unknown. In captivity, male Gray-tailed Voles provide parental care, a behavior that is rare among rodents in the genus Microtus.
Males are larger than females.
Miller, G.S., Jr., 1897. Description of a new vole from Oregon, p. 67. Proceedings of the Biological Society of Washington, 11:67-68.
Mammal Species of the World
Mammalian Species, American Society of Mammalogists' species account