Pectoral Sandpiper

The pectoral sandpiper, often shortened to pec, is a largish calidrid, 19–23 cm long with a wingspan of 37–46 cm, with a grey-brown back that is brownest in the summer male and greyest in winter. It looks like the sharp-tailed sandpiper, with which it often occurs. In breeding plumage males have a blacker breast spotted whitish, and males are on average heavier than females (Wikipedia, general species account).

It is a small migratory wader that breeds in the Arctic of North America and Asia and winters in South America and Oceania, a very long-distance migrant; about half breed in the boggy tundra of northern Asia and the rest from Alaska to central Canada. The nest is a deep, thickly lined hole scraped in the ground that shelters its four eggs from cool breezes. It eats small invertebrates (Wikipedia, general species account).