Calidris melanotos (Pectoral sandpiper) Humboldt Life Lost Coast Outpost Humboldt County News Pectoral Sandpiper (Calidris melanotos) , These medium sized shorebirds nest in the tundra along the Arctic Ocean and then make an 8,000 mile journey to their wintering grounds in South America. , Pectoral Sandpiper. The pectoral sandpiper (Calidris melanotos), often abbreviated pec, is a small, migratory wader that breeds in arctic regions of North America and Asia, wintering in South America and Oceania. It Calidris melanotos (Pectoral sandpiper) vogelwarte.ch Pectoral Sandpiper