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Sierra Garter Snake vs. Western Terrestrial Garter Snake

Both are garter snakes of the Sierra Nevada; their records overlap widely. A: A faint, short or missing stripe on a checkerboard of dark blotches in the Sierra Garter Snake; a clear stripe down the middle in the Western Terrestrial Garter Snake. B: Side stripes dull or missing in the Sierra Garter Snake; a clear stripe low on each side, small dark spots between in the Western Terrestrial Garter Snake. The Sierra Garter is nearly always in or beside water, hunting fish and tadpoles.

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Sierra Garter Snake

Thamnophis couchii

Western Terrestrial Garter Snake

Thamnophis elegans
Sierra Garter Snake vs. Western Terrestrial 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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