Prairie Vole

 

 
A small (4.5"-7"), stocky rodent with a large head, short legs, and a short tail.  Fur is long and coarse, grayish to blackish- brown above, whitish or buff yellow below.  This species is found throughout the midwest.  It is common in upland fields and grasslands.  It typically bulds a system of above and undergroung runways, with many different groups of voles using the same systems.  Prairie voles feed on a variety of plants, but also may occasionally feed on invertebrates.  They can be pests when abundant, but are important for soil mixing and as prey for many predators.