Surface area: 5,774 ha
Elevation: 983-1,525 m

Protection status: Unprotected.

Site description: The site comprises group of lakes called Khargal, located in the southeast of Teshig sum and Olon Lakes, located in its west in the south of soum center. There are about 20 lakes to each other and then connect to Eg River. The biggest one, Khargal, located in the east of Teshig soum, is no outflow. Inlets of the lakes are rich with aquatic plants. Reeds and rushes grow along lake shores. There is large farm field near the lake. The major land use is livestock grazing.

Importance for birds: Globally threatened bird species such as Swan Goose (Anser cygnoides), Pallas’s Fish-eagle (Haliaeetus leucoryphus), Eastern Imperial Eagle (Aquila heliacal), White-naped Crane (Grus vipio) and Great Bustard (Otis tarda) occur at the site. Common Goldeneye (Bucephala clangula), Demoiselle Crane (Anthropoides virgo), Common Crane (Grus grus), Wild Duck (Anas platyrhynchos) and Ruddy Shelduck (Tadorna ferruginea) gather here in flocks, exceeding 1% of their flyway populations. Therefore, Green-winged Teal (A. crecca), Northern Lapwing (Vanellus vanellus) and Common Crane (Grus grus) occur in vast numbers.        

Special flora and fauna: Grey Wolf (Canis lupus), Corsac Fox (Vulpes corsac), Red Fox (V. vulpes) and Tarbagan marmot (Marmota sibirica), listed in Red Data Book of Mongolia, occur around the lake. The extremely rare, Acorus colamus grows here.