155156 Pectoral Sandpiper Calidris melanotos. Westerly gales in September and October bring with them a crop of waders from across the Atlantic. Being powerful fliers, virtually any species that breeds in North America is a contender. Pectoral Sandpiper Calidris melanotos (L 19-22cm) recalls a Dunlin but has yellow legs, white stripes on the back, and a clear demarcation between the clean white underparts and streaked breast.