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Reticulate Collared Lizard vs. Eastern Collared Lizard

They meet near Del Rio and Eagle Pass, where the Rio Grande Plains rise to the Edwards Plateau. A: No bold collars: at most a black patch on each side of the neck in the Reticulate Collared Lizard; two bold black collars in the Eastern Collared Lizard. B: A net of pale lines with scattered big black spots in the Reticulate Collared Lizard; many small pale dots; no big black spots in the Eastern Collared Lizard. Young and females of both have dark crossbars; breeding females of both show orange-red bars.

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Reticulate Collared Lizard

Crotaphytus reticulatus

Eastern Collared Lizard

Crotaphytus collaris
Reticulate Collared Lizard vs. Eastern Collared 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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