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Common Spotted Whiptail vs. Chihuahuan Spotted Whiptail

Both are spotted whiptails of southern New Mexico and west Texas (records share 8 one-degree squares). A: 7 or 8 clean, sharp pale stripes; the spots only in the dark fields in the Common Spotted Whiptail; six faint stripes, the pale spots scattered over the stripes too in the Chihuahuan Spotted Whiptail. B: Males: pink to orange throat, blue-black chest in the Common Spotted Whiptail; whitish or pale blue throat; pale spots turning bright yellow on the hind legs in the Chihuahuan Spotted Whiptail. The Common Spotted Whiptail has males and females; the Chihuahuan Spotted is all female.

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Common Spotted Whiptail

Aspidoscelis gularis

Chihuahuan Spotted Whiptail

Aspidoscelis exsanguis

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

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