Feeding biology of pectoral sandpiper Calidris melanotos (Birds: Scolopacidae) in the floodplain of the Paraná river, Argentina Mónica Bagnarol, Adolfo Beltzer, Martín Quiroga, María de la Paz Ducomm un & Ana Laura Ronchi Virgolini. Natura. 2010;1(41):5-17. doi:10.14409/natura.v1i41.3882