Bolshoy Kak Lake

IBA Justification

The site was identified as important in 2007 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species'):
Species Current IUCN Red List Category Season Year(s) Population estimate at site IBA criteria met
Whooper Swan Cygnus cygnus LC passage 2007 20-1,200 individuals A4i
Red-breasted Goose Branta ruficollis VU passage 2007 1,540-5,020 individuals A1, A4i
Greylag Goose Anser anser LC passage 2007 1,880-5,660 individuals A4i
Greater White-fronted Goose Anser albifrons LC passage 2007 2,500-9,000 individuals A4i
Lesser White-fronted Goose Anser erythropus VU passage 2007 15-37 individuals A1
Common Crane Grus grus LC passage 2007 225-890 individuals A4i
A4iii Species group - waterbirds n/a passage 2007 20,000-49,999 individuals A4iii

The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2007).

IBA Conservation

IBA conservation assessment
Year of assessment (most recent) State (condition) Pressure (threat) Response (action)
2015 favourable not assessed not assessed
Was the whole site assessed? State assessed by Accuracy of information
no population medium

State (condition of the trigger species' populations)
Scientific name Common name Reference population Actual population Units % of population remaining Result
Cygnus olor Mute Swan 900 900 individuals 100 favourable
Cygnus cygnus Whooper Swan 2100 2100 individuals 100 favourable
Spatula querquedula Garganey 500 1000 individuals 100 favourable
Mareca strepera Gadwall 6000 6000 individuals 100 favourable
Mareca penelope Eurasian Wigeon 700 700 individuals 100 favourable
Anas platyrhynchos Mallard 160 12000 individuals 100 favourable
Anas acuta Northern Pintail 7000 7000 individuals 100 favourable
Species group - waterbirds A4iii 28000 29700 individuals 100 favourable

Response (conservation actions taken for the trigger species and/or their habitats)
Protected-area designation Management planning Other conservation action Result
Not assessed Not assessed Not assessed not assessed
For more information about IBA conservation status, please click here


Habitat (IUCN level 1) Habitat detail Extent (% of site)
Grassland Steppes & dry calcareous -
Wetlands (inland) Standing brackish & salt water -
Artificial/Terrestrial Arable land -
For more information about the IUCN Habitat classification, please click here.

Land use

Land-use Extent (% of site)
agriculture -
rangeland/pastureland -

Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Bolshoy Kak Lake. Downloaded from on 04/03/2024.