Common Garter Snake
Thamnophis sirtalis
- KingdomAnimalia (Animals)
- PhylumChordata (Cordats)
- ClassSquamata
- FamilyColubridae (Colúbrids)
- GenusThamnophis (Garter Snakes)
- SpeciesThamnophis sirtalis (Common Garter Snake)
Closest Relatives at Great Smoky Mountains National Park
Common Watersnake
Nerodia sipedon
Eastern Rat Snake
Pantherophis alleghaniensis
Ringneck Snake
Diadophis punctatus
Eastern Worm Snake
Carphophis amoenus
Black Kingsnake
Lampropeltis nigra
DeKay's Brownsnake
Storeria dekayi
Eastern Milksnake
Lampropeltis triangulum
North American Racer
Coluber constrictor
Rough Green Snake
Opheodrys aestivus
Queen Snake
Regina septemvittata
Redbelly Snake
Storeria occipitomaculata
Corn Snake
Pantherophis guttatus
📅 Monthly Probability
☀️ When They're Spotted
Most active during daytime hours (6am–6pm) · across all parks (global)
Global Distribution
Where this species is recorded worldwide. Restricted to human observations from 2019 onwards — the same kind of record and the same period the probabilities on this page are built from, so collar-tracking studies, camera-trap arrays and museum specimens are excluded. Around Santa Rosa that removes 5,924 GPS fixes from a handful of tagged jaguars.
where this species is recorded (GBIF density — it tracks where observers go, not how likely a sighting is) · parks where it occurs — tap a pin for the sighting probability there
Parks Where Found
Quick answers
What are the chances of seeing a Common Garter Snake in Great Smoky Mountains National Park?
About 41% of visitor-days record a Common Garter Snake sighting in Great Smoky Mountains National Park, based on 371 observer-days of citizen-science data from GBIF.
When is the best time to see Common Garter Snake in Great Smoky Mountains National Park?
April has the highest sighting rate for Common Garter Snake in Great Smoky Mountains National Park in our monthly data.