Identification: Male in non-breeding plumage has distinctive medium-long needle-like blackish bill, very long pinkish-red legs, mostly white head, neck and underparts with grey cap and hind neck and black ear-coverts, upper mantle and wings while non-breeding female is browner above. Breeding male has typically all white head and neck while breeding female is browner above and may show some grey on hindneck and head. Juveniles has brownish-grey crown/hindneck and greyish brown mantle with buffy fringes.