Thamnophis
The genus Thamnophis (family Colubridae) has 35 species in SnakeList - 0 venomous and 35 non-venomous.
- Common Gartersnake Thamnophis sirtalis
- Blackbelly Garter Snake Thamnophis melanogaster
- Blackneck Garter Snake Thamnophis cyrtopsis
- Butler's Garter Snake Thamnophis butleri
- Checkered Garter Snake Thamnophis marcianus
- Conant's Garter Snake Thamnophis conanti
- Eastern Ribbonsnake Thamnophis saurita
- Giant Garter Snake Thamnophis gigas
- Godman's Garter Snake Thamnophis godmani
- Goldenhead Garter Snake Thamnophis chrysocephalus
- Highland Garter Snake Thamnophis fulvus
- Liner's Garter Snake Thamnophis lineri
- Liner's Garter Snake (bogerti) Thamnophis bogerti
- Longtail Alpine Garter Snake Thamnophis scalaris
- Madrean Narrowheaded Garter Snake Thamnophis unilabialis
- Mexican Garter Snake Thamnophis eques
- Mexican Wandering Garter Snake Thamnophis errans
- Montane Garter Snake Thamnophis exsul
- Narrowhead Watersnake Thamnophis rufipunctatus
- Northwestern Garter Snake Thamnophis ordinoides
- Plains Garter Snake Thamnophis radix
- Rossman's Garter Snake Thamnophis rossmani
- Santa Cruz Garter Snake Thamnophis atratus
- Short-tail Alpine Garter Snake Thamnophis scaliger
- Shorthead Garter Snake Thamnophis brachystoma
- Southern Durango Spotted Garter Snake Thamnophis nigronuchalis
- Sumichrast's Garter Snake Thamnophis sumichrasti
- Tamaulipan Montane Garter Snake Thamnophis mendax
- Tepalcatepec Valley Gartersnake Thamnophis postremus
- Two-striped Garter Snake Thamnophis hammondii
- West Coast Garter Snake Thamnophis validus
- Western Aquatic Garter Snake Thamnophis couchii
- Western Ribbonsnake Thamnophis proximus
- Western Terrestrial Garter Snake Thamnophis elegans
- Yellow-throated gartersnake Thamnophis pulchrilatus