mixed flock of Semi-palmated plovers, Ruddy Turnstones, Western Sandpipers, Black-bellied plovers, Robb Field, San Diego River, San Diego County, California, January 2010

Red Knot in non-breeding plumage, Robb Field, San Diego River, San Diego County, California, January 2010

Sanderling in non-breeding plumage, Robb Field, San Diego River, San Diego County, California, January 2010