Colorado Checkered Whiptail vs. Western Skink

Their records overlap near Moses Lake and Potholes Reservoir, Washington, where the whiptail is an introduced colony. A: Tiny grain-like scales in the Colorado Checkered Whiptail; smooth, shiny, rounded scales in the Western Skink. B: Six pale stripes; pale spots and bars in the dark fields between them: checkered in the Colorado Checkered Whiptail; bold pale stripes edged by a broad dark band; no checkering in the Western Skink.

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