Thamnophis couchii, commonly known as Couch's garter snake, the Sierra garter snake, or the western aquatic garter snake, is a species of snake in the familyColubridae. The species is endemic to the western United States.
^Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). The Eponym Dictionary of Reptiles. Baltimore: Johns Hopkins University Press. xiii + 296 pp. ISBN978-1-4214-0135-5 (Thamnophis couchii, p. 60).
Further reading
Behler, John L.; King, F. Wayne (1979). The Audubon Society Field Guide to North American Reptiles and Amphibians. New York: Alfred A. Knopf. 743 pp., 657 color plates. ISBN0-394-50824-6. (Thamnophis couchi, pp. 664–666).
Kennicott, Robert (1859). "Eutaenia couchii ". pp. 10–11. In:Baird SF (1859). "No. 4. Report on the Reptiles Collected on the Survey". pp. 9-13 + Plates XI, XXVIII, XXX, XLIV. In:Williamson RS, Abbot HL (1859). ("1855"). Report upon Explorations for a Railroad Route from the Sacramento Valley to the Columbia River. Part IV. Zoological Report. Washington, District of Columbia: United States War Department. (Eutaenia couchii, new species).
Stebbins, Robert C. (2003). A Field Guide to Western Reptiles and Amphibians, Third Edition. The Peterson Field Guide Series ®. Boston and New York: Houghton Mifflin. xiii + 533 pp., 56 color plates, 204 maps. (Thamnophis couchii, p. 381-382, Figure 27 + Plate 49 + Map 167).