Plains Garter Snake
Thamnophis radix

Family Colubridae Description: Adults to 42" in length. Color greenish gray, light olive, to brownish; prominent yellow to orange stripe on back, pale stripe on sides. Moderately slender body; keeled scales. Single anal plate. Elevation Range: Below 7500' in eastern Colorado. Subspecies in Colorado: Thamnophis radix haydenii		Photo from Hammerson, 1986. Used with permission.
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