| The striking olive dorsum of the Olive-backed Pocket Mouse is set off by a yellowish stripe on the side and a white underside. This is the only species of pocket mouse east of the Rocky Mountains whose range extends well into Canada. It inhabits grassland, shrub-steppe, and desert scrub habitat. In cold weather, it may retreat to a grass-lined nest in its burrow and become torpid, suspending activity for a period of time until the weather improves. It appears to prefer loose sandy or sandy-loam soils, where it sandbathes to clean its fur and fur-lined cheek pouches. Like other pocket mice, the Olive-backed Pocket Mouse feeds primarily on seeds that can be stuffed into its cheek pouches and transported to the tunnel system.
Wied, Maximilian, Prince of., 1839. Uber einige nager mit assueren backentaschen aus dem westlichen nord-America, p. 369. I. Uber ein paar neue Gattungen der Nagethiere mit ausseren Backentaschen, Nova Acta Physico-Medica, Academiae, Caesareae Leopoldino-Carolinae, 19:367-374.
Mammal Species of the World
Mammalian Species, American Society of Mammalogists' species account