Common Sandpiper

The Common Sandpiper is a small Palearctic wader with grey-brown upperparts, clean white underparts, short dark-yellowish legs and a straight bill that is pale near the base. Juveniles show stronger barring above and buff edges to the wing feathers. It closely resembles the American Spotted Sandpiper outside that species' breeding plumage, but darker legs and a crisper wing pattern help distinguish it. Its low flight over water is stiff-winged and immediately characteristic. (Wikipedia, general species account)

Usually seen alone or in small groups, the Common Sandpiper repeatedly bobs its rear body while walking along shorelines. It searches by sight on ground and in shallow water, taking insects, crustaceans and other invertebrates, and sometimes catches insects in flight. Nests are placed on the ground near freshwater. The species breeds across temperate and subtropical Europe and Asia, then migrates to Africa, southern Asia and Australia; larger gatherings may form during migration or at seasonal roosts. (Wikipedia, general species account)