Sonoran Whipsnake vs. Western Patch-nosed Snake

Both are slim, fast, striped day-active snakes of rocky desert and foothills across southern Arizona. A: An ordinary snout in the Sonoran Whipsnake; a big, flat scale wrapped over the snout tip, its edges free in the Western Patch-nosed Snake. B: Olive to blue-grey, with two thin white stripes low on each side in the Sonoran Whipsnake; a pale back stripe between two wide dark stripes, and a thin dark line low on each side in the Western Patch-nosed Snake.

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

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