[Maine-birds] Wilson's Plover? - Timber Point

At the end of a very birdy walk this a.m. we noticed a solitary bird (images attached) in the salt-marsh.  He was popping his head up out of the grass and when he finally gave a good look, he stood erect "at attention". Keys out as a Wilson's but any input welcome.

Also of interest on the walk were Western Sandpiper and a slew of warblers - Canada, N Parula, Tennessee, Nashville - as well as the usual suspects.

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