Subspecies
Current scientific classification recognizes thirteen subspecies (ordered by date):
- T. s. sirtalis – Eastern Garter Snake
- T. s. parietalis – Red-sided Garter Snake (has also been introduced to northern Halland in Sweden)
- T. s. infernalis – California Red-sided Garter Snake
- T. s. concinnus – Red-spotted Garter Snake
- T. s. dorsalis – New Mexico Garter Snake
- T. s. pickeringii – Puget Sound Garter Snake
- T. s. tetrataenia – San Francisco Garter Snake (endangered)
- T. s. semifasciatus – Chicago Garter Snake
- T. s. pallidulus – Maritime Garter Snake
- T. s. annectens – Texas Garter Snake
- T. s. fitchi – Valley Garter Snake
- T. s. similis – Blue-striped Garter Snake
- T. s. lowei
Read more about this topic: Common Garter Snake