San Francisco Garter Snake
San Francisco Gartersnake
FWS Focus


The San Francisco garter snake ( Thamnophis sirtalis tetrataenia) is a slender, colorful snake in the Colubridae family, which includes most of the species of snakes found in the western United States. This subspecies has a burnt orange head, greenish-yellow dorsal stripe edged in black, bordered by a red stripe, which may be continuous or broken with black blotches, and then a black stripe. The belly color varies from greenish-blue to blue. Large adults can reach 3 feet or more in length.

Scientific Name

Thamnophis sirtalis tetrataenia
Common Name
San Francisco Garter Snake
San Francisco Gartersnake
FWS Category

Location in Taxonomic Tree

Identification Numbers



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