This species derives its name from the form of the bill, which is curved downwards, as in the curlew; pigmy curlew is one of its common names. It is an annual visitor on migration to this country, on the east side chiefly, and occasionally penetrates to inland waters. It associates with dunlins on the sand and mud flats, and resembles that species in its feeding habits, but when flying may be easily distinguished by its conspicuous white tail-coverts. On its return from its breeding-grounds it remains on our coasts from August to October. From its winter haunts in the south it begins to arrive at the end of March, the migration continuing until June. At this season the birds are in their full summer dress, which resembles that of the knot. The bird is, Seebohm writes, ‘a miniature knot with a long, decurved bill.’ Its breeding-grounds have not yet been discovered. Purple Sandpiper. Tringa striata. Head and neck dusky brown tinged with grey; upper parts nearly black, with purple reflections; the feathers edged with ash; throat, neck, and breast greyish; below, white; legs and feet ochre-yellow. Length, eight and a quarter inches. In winter the upper parts are sooty and the breast dark ash-brown, with faint lines and mottlings. * * * * * The purple sandpiper is an inhabitant of the British coasts in autumn and winter, and is occasionally seen associating with dunlins on the sand and mud flats, and may readily be distinguished by its darker colour and its lumpier figure, caused by the thickness of its winter plumage. But its favourite haunts are rocky shores, where it feeds among the stranded seaweed on marine insects, small shrimps, and other crustaceans. It is, in fact, a sandpiper with the feeding habits of the turnstone. It is known to breed on the Faröes, where it nests on the fells and mountains and lays four eggs, pale green or olive, blotched with reddish brown, with purplish under-markings. Its eggs have never been found within the British Islands, but it is probable that a few pairs breed annually on some of the islands and on the mainland of Scotland. In its summer haunts in the arctic regions it is said to be the most abundant sandpiper. With us it is not a common species, and is seen in small flocks of half a dozen to a dozen birds. Knot. Tringa canutus. Crown and neck reddish brown with darker streaks; mantle blackish; the feathers spotted with chestnut and margined with white; tail-coverts white barred with black; cheeks, throat, and breast chestnut. Length, ten inches. In winter the upper parts are ash-grey and the under parts white flecked with grey. * * * * * [Illustration: FIG. 103.--KNOT. ¼ natural size.]