Classification
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Thamnophis - North American Garter & Ribbon Snakes
- Thamnophis atratus - Aquatic Gartersnake
- Thamnophis bogerti - Bogert's Gartersnake
- Thamnophis brachystoma - Short-headed Gartersnake
- Thamnophis butleri - Butler's Gartersnake
- Thamnophis chrysocephalus - Goldenhead Gartersnake
- Thamnophis conanti - Conant's Gartersnake
- Thamnophis couchii - Sierra Gartersnake
- Thamnophis cyrtopsis - Black-necked Gartersnake
- Thamnophis elegans - Terrestrial Gartersnake
- Thamnophis eques - Mexican Gartersnake
- Thamnophis errans - Mexican Wandering Gartersnake
- Thamnophis exsul - Exiled Mexican Gartersnake
- Thamnophis fulvus - Mesoamerican Highlands Gartersnake
- Thamnophis gigas - Giant Gartersnake
- Thamnophis godmani - Godman's Gartersnake
- Thamnophis hammondii - Two-striped Gartersnake
- Thamnophis lineri - Liner's Gartersnake
- Thamnophis marcianus - Checkered Gartersnake
- Thamnophis melanogaster - Mexican Black-bellied Gartersnake
- Thamnophis mendax - Tamaulipas Montane Gartersnake
- Thamnophis nigronuchalis - Durangan Spotted Gartersnake
- Thamnophis ordinoides - Northwestern Gartersnake
- Thamnophis postremus - Tepalcatepec Valley Gartersnake
- Thamnophis proximus - Western Ribbonsnake
- Thamnophis pulchrilatus - Mexican Highland Gartersnake
- Thamnophis radix - Plains Gartersnake
- Thamnophis rossmani - Rossman's Gartersnake
- Thamnophis rufipunctatus - Narrow-headed Gartersnake
- Thamnophis sauritus - Eastern Ribbonsnake
- Thamnophis scalaris - Long-tailed Alpine Gartersnake
- Thamnophis scaliger - Short-tailed Alpine Gartersnake
- Thamnophis sirtalis - Common Gartersnake
- Thamnophis sumichrasti - Sumichrast's Gartersnake
- Thamnophis validus - Mexican West Coast Gartersnake
