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Location Mongolia, Bayankhongor
Central coordinates 100o 45.00' East  45o 4.00' North
IBA criteria A1, A4i
Area 28,000 ha
Altitude 1,217 - 1,244m
Year of IBA assessment 2009

Site description Orog Lake is a saltwater lake. Water levels vary, depending on in-flow from the Tuin River, which rises in the Khangai mountain range. The lake is frozen from November until May. The Tuin River creates a large wetland on north side of the lake. To the south, the lake is bordered by the slopes of Ikh Bogd Mountain, which support desert steppe, and give rise to several streams with associated wetlands. On the northern side of the lake, there is a wide sand dune which stretches along the shore. Orog Lake is located within the Valley of Lakes Ramsar Site.

Key Biodiversity Globally Threatened species occurring at the site are Dalmatian Pelican Pelecanus crispus (VU), Swan Goose Anser cygnoides (VU), Pallas’s Fish-eagle Haliaeetus leucoryphus (VU), Saker Falcon Falco cherrug (EN), Lesser Kestrel F. naumanni (VU) and Relict Gull Larus relictus (VU). The site supports an assemblage of species restricted to the Eurasian steppe and desert biome. The site supports at least 1% of the flyway populations of the following congregatory waterbirds: Great Crested Grebe Podiceps cristatus; Common Shelduck Tadorna tadorna; and Ruddy Shelduck T. ferruginea.

Non-bird biodiversity: No information on other fauna and fl ora is available.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Swan Goose Anser cygnoid breeding  2004  present  A1  Vulnerable 
Ruddy Shelduck Tadorna ferruginea 2004  present  A4i  Least Concern 
Common Shelduck Tadorna tadorna 2009  present  A4i  Least Concern 
Great Crested Grebe Podiceps cristatus 2004  present  A4i  Least Concern 
Dalmatian Pelican Pelecanus crispus breeding  2004  present  A1, A4i  Vulnerable 
Lesser Kestrel Falco naumanni breeding  2004  present  A1  Least Concern 
Saker Falcon Falco cherrug 2009  present  A1  Endangered 
Pallas's Fish-eagle Haliaeetus leucoryphus 2009  present  A1  Vulnerable 
Relict Gull Larus relictus breeding  2004  present  A1  Vulnerable 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Valley of Lakes Wetlands of International Importance (Ramsar) 45,600 protected area overlaps with site 14,000  


IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland)   -
Desert   -

Protection status Unprotected

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Orog Lake. Downloaded from on 22/10/2016

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