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Gilbert's Skink vs. Western Skink

Both live under rocks and logs across much of California; their records overlap widely. A: Plain olive or brown; the stripes of the young have faded in the Gilbert's Skink; bold pale stripes edging a broad brown band, kept into adulthood in the Western Skink. B: Pink, orange or red in many young (blue in others) in the Gilbert's Skink; always blue in the young, often still blue in adults in the Western Skink. C: Blackish bands between the pale stripes, no wide brown band in the Gilbert's Skink; a wide brown band down the middle, edged black, between the pale stripes in the Western Skink. Breeding male Gilbert's Skinks have a red or orange head. A small, blue-tailed young one can still be hard to place: Gilbert's grows larger and loses its stripes, so a large striped skink is a Western; where both live, the brown back band is the best clue.

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Gilbert's Skink

Plestiodon gilberti

Western Skink

Plestiodon skiltonianus
Gilbert's Skink vs. Western Skink: comparison sheet with the differences marked

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

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