Red List Category
for more information about the Red List categories and criteria
Justification of Red List category
This species is listed as Endangered because it has a very small population which is declining as a result of the development of coastal wetlands throughout its range, principally for industry, infrastructure projects and aquaculture. Preliminary analyses of survey data collected at its breeding sites in Russia have provided evidence that the species's population is indeed undergoing a very rapid decline and imply that the population size may have been overestimated; clarification of these results may lead to a review of its threat status in the near future.
330-670 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 - Indomalayan - realm
Realm - Palearctic - realm
IUCN Ecosystem -- Freshwater biome
IUCN Ecosystem -- Terrestrial biome
IUCN Ecosystem -- Marine biome