Common Garter Snake
Thamnophis sirtalis
- KingdomAnimalia (Animals)
- PhylumChordata (Cordats)
- ClassSquamata
- FamilyColubridae (Colúbrids)
- GenusThamnophis (Garter Snakes)
- SpeciesThamnophis sirtalis (Common Garter Snake)
Closest Relatives at Shenandoah National Park
Ribbon Snake
Thamnophis saurita
Eastern Rat Snake
Pantherophis alleghaniensis
Common Watersnake
Nerodia sipedon
Ringneck Snake
Diadophis punctatus
Eastern Milksnake
Lampropeltis triangulum
Eastern Worm Snake
Carphophis amoenus
North American Racer
Coluber constrictor
Redbelly Snake
Storeria occipitomaculata
DeKay's Brownsnake
Storeria dekayi
Rough Green Snake
Opheodrys aestivus
Eastern Hognose Snake
Heterodon platirhinos
Mole snake
Lampropeltis rhombomaculata
📅 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 Shenandoah National Park?
About 41% of visitor-days record a Common Garter Snake sighting in Shenandoah National Park, based on 338 observer-days of citizen-science data from GBIF.
When is the best time to see Common Garter Snake in Shenandoah National Park?
October has the highest sighting rate for Common Garter Snake in Shenandoah National Park in our monthly data.