Siverga lake

IBA Criteria

Year of most recent IBA criteria assessment: 2006

Populations of IBA trigger species
Species Current IUCN Red List Category Season Year(s) of estimate Population estimate IBA Criteria Triggered
Red-breasted Goose Branta ruficollis VU passage 2000 250 individuals A1
Greater White-fronted Goose Anser albifrons LC passage 2000 10,000-25,000 individuals A4i
Pied Avocet Recurvirostra avosetta LC breeding 2000 125-150 breeding pairs A4i
Little Gull Hydrocoloeus minutus LC passage 2000 1,500-2,000 individuals A4i
Pallid Harrier Circus macrourus NT breeding 2000 10-15 breeding pairs A1
A4iii Species group - waterbirds n/a passage 2000 12,650-29,350 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 Protection

Protection status:

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
Tobol-Ishim Forest-steppe Ramsar Site, Wetland of International Importance 1,217,000 protected area contains site 0
Ozera Tobolo-Ishimskoy lesostepi International Park 0 protected area contains site 0


IUCN Habitat Habitat detail Extent (% of site)
Grassland Steppes and dry calcareous grassland -
Wetlands (inland) Standing brackish and salt water, Mud flats and sand flats -
Artificial/Terrestrial Arable land -
For further information about the habitat classification please click here.

Land use

Land-use Extent (% of site)
agriculture -
rangeland/pastureland -
hunting -
For further information about the land use classification please click here.

Recommended citation
BirdLife International (2021) Important Bird Areas factsheet: Siverga lake. Downloaded from on 22/01/2021.