San Diego County, California, US
One juvenile bird in a flock of Least Sandpipers on north bank of river, told by larger size, black legs, much whiter face (bold supercilium) and short, stubby bill.
Semipalmated Sandpipers with Semipalmated Plovers
The Semipalmated Sandpiper (Calidris pusilla) is a very small shorebird. It is sometimes separated with other "stints" in Erolia, but, although these apparently form a monophyletic group, the present species' old genus Ereunetes had been proposed before Erolia.