turnstone (TURN-stohn) - n., either of two species of sandpipers of genus Arenaria, especially the ruddy turnstone (A. interpres).

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The ruddy turnstone is worldwide, while the black turnstone (A. melanocephala) is a strictly western North American birb. So called from their habit of turning over stones in search of food (in their case, marine invertebrates).
---L.
Thanks, WikiMedia!
The ruddy turnstone is worldwide, while the black turnstone (A. melanocephala) is a strictly western North American birb. So called from their habit of turning over stones in search of food (in their case, marine invertebrates).
---L.