A Guide to the Amphibians
and Reptiles of California

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Range Maps for California Gartersnakes

California Gartersnakes ID

Key to California Gartersnakes

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Range Map Range Map Range Map
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

range map range map range map
Two-striped Gartersnake
Thamnophis hammondii

Sierra Gartersnake
Thamnophis couchii
Giant Gartersnake
Thamnophis gigas
range map range map  
Northwestern Gartersnake
Thamnophis ordinoides
Marcy's Checkered Gartersnake
Thamnophis marcianus marcianus

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