Uncommon to fairly common migrant in spring and autumn, between Arctic breeding grounds and African winter grounds. Mainly in coastal wetland habitats, often with flocks of Dunlin. Slightly larger than Dunlin, with longer and finer bill, longer legs. In flight note big white rump patch. Breeding plumage deep rusty on head and body (like Red Knot). Juvenile is grayish above with neat scaly feather edgings, whitish below with variable buffy wash on breast.