More shorebirds arrive each day. Willets, who left for their South America wintering areas last July, once again own the Delaware Bay marshes, fighting for territories and generally making a racket throughout the marsh. All winter long we spotted sanderling, dunlin and occasionally black bellied plovers. This week, however, one could see tight flocks of Calidrids probably least sandpipers flying low over the distant marsh. Always the first to arrive in good numbers, leasts will stick to the marshes for the most part. Next week, will almost certainty bring semipalmated sandpipers and maybe the start of turnstones and even the odd knot moving up the coast from nearby wintering areas in VA or NC.