Garter snakes (''Thamnophis'' spp.) are in the subfamily Natricinae of the family Colubridae and are extremely common pet snakes. They are very agile and live between three to 10 years in captivity. | Garter snakes (''Thamnophis'' spp.) are in the subfamily Natricinae of the family Colubridae and are extremely common pet snakes. They are very agile and live between three to 10 years in captivity. |