Terrible photo under terribly dark and rainy conditions. I expect no confirmation; this is for the record
With a Semipalmated Sandpiper for size comparison
A couple of the Western Sandpipers mixed in with the Leasts.
A White-rumped Sandpiper on the Ninigret Tidal Flats.
Try as I might, I can't make this into anything else but an immature Dunlin.
The calidrids or typical waders are a group of Arctic-breeding, strongly migratory wading birds. These birds form huge mixed flocks on coasts and estuaries in winter. They are the typical "sandpipers", small to medium-sized, long-winged and relatively short-billed.