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Common Side-blotched Lizard vs. Desert Horned Lizard

Both live in southern Idaho. The Common Side-blotched Lizard has a dark blotch on the side just behind the front leg and tiny grainy back scales; the Desert Horned Lizard has a flat, round body with a row of pointed horns. A: Common Side-blotched Lizard, no horns: an ordinary lizard head; Desert Horned Lizard, pointed horns at the back of the head. B: Common Side-blotched Lizard, slim, with a long tail; Desert Horned Lizard, flat and round, with a fringe of spiky scales and a short tail.

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Common Side-blotched Lizard

Uta stansburiana

Desert Horned Lizard

Phrynosoma platyrhinos
Common Side-blotched Lizard vs. Desert Horned 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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