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Sonoran Lyre Snake vs. Desert Nightsnake

Both are slim, grey, blotched night snakes with cat-like pupils, on rocky slopes across much of Arizona. A: A dark lyre-shaped mark on top of a broad head in the Sonoran Lyre Snake; no lyre mark; a dark bar from the eye back to the neck in the Desert Nightsnake. B: No big neck blotches in the Sonoran Lyre Snake; a dark collar of three blotches on the neck in the Desert Nightsnake. C: Bigger: to 40 in, with under 30 big blotches each split by a pale crossbar in the Sonoran Lyre Snake; small: to 23 in, with many small blotches in the Desert Nightsnake.

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Sonoran Lyre Snake

Trimorphodon lambda

Desert Nightsnake

Hypsiglena chlorophaea
Sonoran Lyre Snake vs. Desert Nightsnake: comparison sheet with the differences marked

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

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