Southern Bog Lemming
The southern bog lemming looks much like the meadow vole, with chestnut brown upper parts and silver-gray sides and belly. Length is 4.5 - 5.7 inches, including a tail of 0.6 - 1 inch; weight is 0.9 - 1.6 ounces. The species is found in scattered pockets across Pennsylvania, mainly in old fields grown up with poverty grass, timothy, broom sedge, hawthorns, crabapples and locust. Bog lemmings live beneath matted dead grass in surface runways created by their cutting of and feeding on low-growing plants. They eat stems and seeds of grasses and sedges, along with berries, fungi and mosses. The species breeds from early spring to late autumn, with 3 - 5 young per litter and several litters each year. Southern bog lemmings often share habitats with red-backed voles, meadow voles, white-footed mice and deer mice.