Thirteen-lined Ground Squirrel
Capt. Lewis, July 8, 1805--the men also brought me a living ground squirrel which is something larger than those of the U’States or those of that kind which are also common here. this is a much ha[n]dsomer anamal. like the other it’s principal colour is a redish brown but is marked longitudinally with a much greater number of black or dark bro[w]n stripes; the spaces between which is marked by ranges of pure white circular spots, about the size of a brister blue shot. these colours imbrace the head neck back and sides; the tail is flat, or the long hair projecting horizontally from two sides of it only gives it that appearance. the belly and breast are of much lighter brown or nearly white. this is an inhabitant of the open plain altogether, wher it burrows and resides; nor is it like the other found among clifts of rocks or in the woodlands. their burrows sometimes like those of the mole run horizontally near the surface of the ground for a considerable distance, but those in which they reside or take refuge strike much deeper in the earth.