Need help -- again

I imaged this bird this past week in Surfside Beach, South Carolina. I think he's a sandpiper of some kind, but I don't know which variety.

My wife and I thought he'd lost a leg, but when he subsequently flew away we saw he had both.

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For perspective, here is the same bird with some sanderlings nearby. At least, I think they are sanderlings.

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Well if I had to make a guess I'd say it is a Eastern Willet, but it is only a guess.


Robert