Sorbulak Lake System

IBA Criteria

Year of most recent IBA criteria assessment: 2007

Populations of IBA trigger species
Species Current IUCN Red List Category Season Year(s) of estimate Population estimate IBA Criteria Triggered
White-headed Duck Oxyura leucocephala EN passage 1980-2003 20-200 individuals A1, A4i
Smew Mergellus albellus LC winter 1980-2003 600-12,000 individuals A4i
Ruddy Shelduck Tadorna ferruginea LC winter 1980-2003 1,000-20,000 individuals A4i
Red-crested Pochard Netta rufina LC passage 1980-2003 500-15,000 individuals A4i
Ferruginous Duck Aythya nyroca NT breeding 1980-2003 10-50 individuals A1
Mallard Anas platyrhynchos LC passage 1980-2003 1,500-50,000 individuals A4i
Northern Pintail Anas acuta LC passage 1980-2003 500-35,000 individuals A4i
Common Coot Fulica atra LC passage 1980-2003 3,000-40,000 individuals A4i
Dalmatian Pelican Pelecanus crispus NT breeding 1980-2003 80-300 individuals A1, A4i
Great White Pelican Pelecanus onocrotalus LC non-breeding 1980-2003 10-300 individuals A4i
Great Cormorant Phalacrocorax carbo LC breeding 1980-2003 300-5,000 breeding pairs A4i
Black-headed Gull Larus ridibundus LC breeding 1980-2003 200-8,000 breeding pairs A4i
Common Gull-billed Tern Gelochelidon nilotica LC breeding 1980-2003 100-2,500 breeding pairs A4i
A4iii Species group - waterbirds n/a passage 1980 20,000 individuals A4iii

Note: This table presents the IBA criteria triggered and the species that triggered then at the time of assessment, the current IUCN Red List category may vary from that which was in place at that time.

For more information about the IBA assessment process and criteria please click here

IBA Monitoring

Most recent IBA monitoring assessment
Year of assessment Threat score (pressure) Condition score (state) Action score (response)
2018 not assessed favourable high
Was the whole site covered? Yes State assessed by Population
Accuracy of information good


IUCN Habitat Habitat detail Extent (% of site)
Desert Desert & semi-desert - sandy, Desert & semi-desert - clay -
Artificial/Aquatic & Marine Artificial water bodies -
Forest Flood-plain, Wooded steppe -
Shrubland Low bushes, Scrub -
Grassland Dry grassland on sandy soils -
Wetlands (inland) Water-fringe vegetation -
For further information about the habitat classification please click here.

Land use

Land-use Extent (% of site)
agriculture -
fisheries/aquaculture -
water management -
other -
For further information about the land use classification please click here.

Recommended citation
BirdLife International (2021) Important Bird Areas factsheet: Sorbulak Lake System. Downloaded from on 04/08/2021.