Sexes alike. Grey-brown above; long, slightly upcurved, blackish beak; white forehead and underbody; in flight, white lower back, rump and absence of white
in wings diagnostic; long, greenish legs. In summer, darker above, with blackish centres to feathers. The Marsh Sandpiper T. stagnatilis is very similar but smaller and has distinctly longer legs; also has distinctive call. Either solitary or small groups of two to six birds, often with Common Redshanks and other waders; feeds at edge of water but may enter water to belly level.