Sonoran Collared Lizard vs. Desert Collared Lizard

Very alike: the Sonoran Collared lives in the Sonoran Desert south of the Gila River, the Desert (Great Basin) Collared north and west of it; they meet near the Gila. A: Round in cross-section, no pale stripe on top in the Sonoran Collared Lizard; flattened from side to side, with a pale stripe down the top in the Desert Collared Lizard. B: Pale dots between dark spots, bigger on top of the back in the Sonoran Collared Lizard; small pale spots, often with pale crossbars in the Desert Collared Lizard.

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

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