This is not a gregarious species, although sometimes small numbers congregate in suitable feeding areas. Green Sandpiper is very much a bird of fresh water, and is often found in sites too restricted for other waders, which tend to like a clear all-round view.
This species is a dumpy wader with a dark green back, greyish head and breast and otherwise white underparts. The back is spotted white to varying extents, being maximal in the breeding adult, and less in winter and young birds. The legs and short bill are both dark green.
It is obvious in flight, with wings dark above and below, and a brilliant white rump. The latter feature distinguishes it from the slightly smaller but otherwise very similar Solitary Sandpiper of North America to which it is closely related.In flight it has a characteristic three-note whistle
Green Sandpiper lays 2-4 eggs in an old tree nest of another species, such as a Fieldfare. The eggs take about three weeks to hatch.
Food is small invertebrate items picked off the mud as this species works steadily around the edges of its chosen pond.