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Location Russia (Central Asian), Tyumen region
Central coordinates 68o 45.32' East  55o 24.90' North
IBA criteria A1, A4i, A4iii
Area 7,500 ha
Altitude 120 - 130m
Year of IBA assessment 2006

Key Biodiversity Important area for nesting Circus macrourus and Anas acuta.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Greater White-fronted Goose Anser albifrons passage  2000  10,000-25,000 individuals  medium  A4i  Least Concern 
Red-breasted Goose Branta ruficollis passage  2000  250 individuals  good  A1  Vulnerable 
Pallid Harrier Circus macrourus breeding  2000  10-15 breeding pairs  medium  A1  Near Threatened 
Pied Avocet Recurvirostra avosetta breeding  2000  125-150 breeding pairs  medium  A4i  Least Concern 
Little Gull Hydrocoloeus minutus passage  2000  1,500-2,000 individuals  good  A4i  Least Concern 
A4iii Species group - waterbirds passage  2000  12,650-29,350 individuals  medium  A4iii   

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
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  15%
Wetlands (inland) Mud flats and sand flats; Standing brackish and salt water  80%
Artificial - terrestrial Arable land  5%

Land use

Land-use Extent (% of site)
agriculture 15%
rangeland/pastureland 25%
hunting 100%

Acknowledgements The identification of IBAs and information collected between 1980 and 2009 provided by the IBA network of the Russian Bird Conservation Union (RBCU).

References Morozov V.V.

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Siverga lake. Downloaded from on 26/10/2016

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