A sandpiper with dark upperparts and a white rump, seen mainly on passage and in winter in lowland wetlands in Hong Kong.
It has dark upperparts and underwings, with a white belly and rump. In flight, the white rump and broad tail bars show clearly.
It is often seen alone at the water’s edge or walking through shallow water. When flushed, it gives a ringing call, flies in a zigzag, and lands farther away.
It uses old thrush or crow nests in trees, or squirrel dreys. The usual clutch is four eggs, incubated mainly by the female with occasional male participation for 20–23 days. Chicks are downy.
It usually picks invertebrates from the water surface and seldom probes mud. It bobs up and down while standing.
The pale eyebrow does not extend behind the eye, and the legs are greenish. Juvenile wing-coverts and tertials have small buff spots along their edges.
An extinction-risk assessment has not been added yet.