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Location Mongolia, Zavkhan
Central coordinates 96o 36.00' East  49o 7.00' North
IBA criteria A1, A4i
Area 20,189 ha
Altitude 1,664 m
Year of IBA assessment 2009

Site description This is a beautiful steppe lake located in a valley between Bulnai and Khan Khokhii mountains. The site comprises Oigon Lake and two nearby lakes: Shorbog Nuur; and Nogoon Nuur. Several small rivers enter the lake from the north, creating a marshy and wet grassland delta. Some streams have stopped running because of drought, however.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Ruddy Shelduck Tadorna ferruginea 2009  present  A4i  Least Concern 
Common Goldeneye Bucephala clangula 2009  present  A4i  Least Concern 
Saker Falcon Falco cherrug 2009  present  A1  Endangered 
Larus argentatus 2009  present  A4i  Not Recognised 

Other biodiversity Grey Wolf Canis lupus, Red Fox Vulpes vulpes, Pallas’s Cat Felis manul (NT) and Siberian Marmot Marmota sibirica (EN) occur at the site.

Protection status Unprotected

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Oigon Lake. Downloaded from on 02/10/2014

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