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Marbled Whiptail vs. Western Whiptail

Close relatives (the Marbled was long a form of the Western Whiptail); they meet in far southwestern New Mexico and Arizona (records share 2 one-degree squares). A: Black bars and marbling all over; the pale stripes broken up and mostly gone in the Marbled Whiptail; a dark net over pale stripes that are still easy to see in the Western Whiptail. Many cannot be told apart by sight: PLACE HELPS. In New Mexico the Western Whiptail lives in the San Juan Basin and the far west; the Marbled on the southern creosote flats.

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Marbled Whiptail

Aspidoscelis marmoratus

Western Whiptail

Aspidoscelis tigris
Marbled Whiptail vs. Western Whiptail: comparison sheet with the differences marked

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

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