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Clark's Spiny Lizard vs. Plateau Fence Lizard

Both live on rocks and trees in central Arizona below the Mogollon Rim; a young Clark's is the size of an adult fence lizard. A: Broad, high-contrast dark brown or black bands across the wrist and lower arm in the Clark's Spiny Lizard; no bold wrist bands: speckled, weakly barred or lined lengthwise in the Plateau Fence Lizard. B: A pale diagonal band from below the eye to the corner of the mouth, bordered by a dark bar on the lip scales in the Clark's Spiny Lizard; lip scales mottled grey or brown; no bold dark bar below the eye in the Plateau Fence Lizard. C: Grey with soft crossbars and no pale stripes in the Clark's Spiny Lizard; usually two pale stripes on the back in the Plateau Fence Lizard.

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Clark's Spiny Lizard

Sceloporus clarkii

Plateau Fence Lizard

Sceloporus tristichus
Clark's Spiny Lizard vs. Plateau Fence Lizard: comparison sheet with the differences marked

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

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