Red List Category
for more information about the Red List categories and criteria
Justification of Red List category
This species has a moderately small population, which is divided into a number of isolated sub-populations, and is likely to be declining as a result of wetland destruction in its breeding and wintering grounds, however recent surveys suggest that the population at Poyang Lake, China, could exceed 5,000 pairs (giving a global population exceeding 10,000 individuals), and the species has consequently been downlisted to Near Threatened.
6700-10000 mature individuals
Distribution size (breeding/resident):
Land-mass type - continent - Continents are land masses > bigger than Australia (=7,682,300 sq km).
Land-mass type - shelf island - Continental islands include all other islands or island groups. Generally they were once part of continents and lie on a continental shelf of < 200 m sea depth.
Realm - Palearctic - realm
Realm - Indomalayan - realm
IUCN Ecosystem -- Freshwater biome