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Black-necked Garter Snake vs. Western Terrestrial Garter Snake

They meet along streams and lakes where the oak woodland of the Mogollon Rim and the White Mountains rises into pine forest. A: Two big jet-black crescents behind the head in the Black-necked Garter Snake; no black neck crescents in the Western Terrestrial Garter Snake. B: Orange-yellow on the neck, clean-edged in the Black-necked Garter Snake; cream, often cut into by alternating dark blotches in the Western Terrestrial Garter Snake.

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Black-necked Garter Snake

Thamnophis cyrtopsis

Western Terrestrial Garter Snake

Thamnophis elegans
Black-necked 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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