LookalikesCommon Garter Snake vs Western Ribbonsnake

Common Garter Snake vs Western Ribbonsnake

Striped snake in the garden - garter or ribbon?

Common Garter Snake
Common Garter Snake
Thamnophis sirtalis
Western Ribbonsnake
Western Ribbonsnake
Thamnophis sauritus

The quick tell

Ribbon snakes are the supermodel version of a garter: dramatically slimmer, with a tail that makes up about a third of their length and clean, crisp stripes with no checkerboard between them. Garters are stockier, shorter-tailed, and usually show dark checkering between their stripes.

Field marks, side by side

Common Garter SnakeWestern Ribbonsnake
BuildStocky; tail roughly a quarter of total lengthVery slender; tail about a third of total length
PatternCheckerboard spots between the stripesClean stripes, no checkering
FaceVariable lip markingsBright white spot in front of each eye, clean white lips
HabitatAlmost anywhere: gardens, fields, woodsStrongly tied to water edges and wet meadows

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Common questions

Are garter or ribbon snakes dangerous?

No. Both are harmless to people and quietly useful - they eat slugs, earthworms, amphibians, and small rodents. Neither has meaningful venom, and both would rather flee than bite.

Why is the snake by my pond so skinny?

A striped snake at the water’s edge that looks impossibly thin, with a very long tail and spotless stripes, is likely a ribbon snake. Garters near water are chunkier and usually show dark checks between their stripes.

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