A Guide to the Amphibians
and Reptiles of California

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Range Maps for California Gartersnakes


Aquatic Gartersnake	Terrestrial Gartersnake	Common Gartersnake
Red: Thamnophis atratus atratus - Santa Cruz Gartersnake Orange: Thamnophis atratus hydrophilus - Oregon Gartersnake Light Blue: Thamnophis atratus zaxanthus - Diablo Range Gartersnake Gray: T. a. hydrophilus x T. a. atratus x T. a. zaxanthus Intergrades Dark Blue: T. a. atratus x T. a. zaxanthus intergrades	Red: Thamnophis elegans elegans - Mountain Gartersnake Purple: Thamnophis elegans terrestris - Coast Gartersnake Blue: Thamnophis elegans vagrans - Wandering Gartersnake Gray: General area of intergradation	Orange: Thamnophis sirtalis fitchi - Valley Gartersnake Red: Thamnophis sirtalis infernalis- California Red-sided Gartersnake Purple: Thamnophis sirtalis ssp.- South Coast Gartersnake Blue: Thamnophis sirtalis tetrataenia- San Francisco Gartersnake

Two-striped Gartersnake Thamnophis hammondii	Sierra Gartersnake Thamnophis couchii	Giant Gartersnake Thamnophis gigas

Northwestern Gartersnake Thamnophis ordinoides	Marcy's Checkered Gartersnake Thamnophis marcianus marcianus