Florida Snake Identification Key
Common Garter Snake
Scientific name: Thamnophis sirtalis (LINNAEUS 1766)
The following will separate the two Garter Snakes found in Florida. If you are unable to distinguish between them based on the characteristics in the key below, you probably can do so using the geographic location alone.
Select the box below that is the closest match to your snake:
Yellow side stripes; peninsular Florida north to Newfoundland and west to Ontario and eastern Texas.
Your snake could be a Eastern Garter Snake, Thamnophis sirtalis sirtalis.
Bluish side stripes; the Gulf coast of peninsular Florida from the Withlacoochee River north to Wakulla County.
Your snake could be a Bluestripe Garter Snake, Thamnophis sirtalis similis.