Dayan Lake
Dayan Lake is a lake in Sagsai District, Bayan-Ölgii Province, Mongolia. It is recognized by BirdLife International as an Important Bird Area since 2009. It is located in the Altai Tavan Bogd National Park.
Dayan Lake remains frozen from October to June. In the area, there are wolves, red foxes and Pallas's cat. From the lake area, there is a view of the Altai Mountains; potentially the place may turn out to be interesting from the point of view of ecotourism.
Due to the six species of birds breeding in the surrounding areas, the lake, along with Khar Lake south-east of Dayan lake and coastal areas, was considered a bird sanctuary. Six species nest around the lakes that BirdLife has identified as key. One, the saker falcon, is in danger of extinction, and the white-throated bush chat is in danger. The other three are considered to be of least concerns; they include: northern lapwing, lesser kestrel and bar-headed goose.