| Spiny pocket mice are well supplied with bristly spines on their backs. The spines are modified hairs, as are porcupine quills, but they are not nearly as hard as quills. These little mammals are shy and nocturnal. They live mostly in forests and hide the entrances to the dens they dig by locating the hole under a rock, log, or shrub. The opening is just a hole: it is not marked by a mound of earth.
Head and Body: 123-148 mm; Tail: 133-196 mm
Gray, J. E., 1868. Proceedings of the Zoological Society of London, 1868:204.
Mammal Species of the World (opens in a new window).