Medium-sized wader with a long, slightly downcurved bill. Slightly larger than Dunlin, with longer and finer bill, longer legs. In flight note large white rump patch. Breeding plumage deep rusty on head and body (like Red Knot). Non-breeding birds are grayish-brown above with white eyebrows and belly. Juvenile is grayish above with neat scaly feather edgings, whitish below with variable buffy wash on breast. Breeds in Russian tundra and winters in Africa, Australia, and South and Southeast Asia. Mainly in coastal wetland habitats, often with flocks of Dunlin.