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Short-headed Garter Snake vs. Common Garter Snake

Both have three pale stripes, with the side stripe on scale rows 2 and 3, and both live in the old fields and meadows of northwestern Pennsylvania. The Short-headed Garter Snake has a very small head, hardly wider than its neck, and plain, unbarred lips. The Common Garter Snake has a larger head that stands out clearly from the neck, and usually dark bars on the lips.

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Short-headed Garter Snake

Thamnophis brachystoma

Common Garter Snake

Thamnophis sirtalis
Short-headed Garter 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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