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Lined Snake vs. Common Garter Snake

Both are striped snakes with a pale stripe down the middle of the back and one low on each side, on scale rows 2 and 3. The Lined Snake is small, grey-brown or olive, with a narrow head barely wider than the neck, plain lips, and two rows of bold black half-moons down its white belly; the Common Garter Snake is bigger, with a head clearly wider than the neck, dark bars on the lip scales, and a plain or lightly dotted belly.

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Lined Snake

Tropidoclonion lineatum

Common Garter Snake

Thamnophis sirtalis
Lined Snake vs. Common Garter Snake: comparison sheet with the differences marked

Photographs via iNaturalist under Creative Commons licences; the photographers are credited on the sheet.

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