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The site was identified as internationally important for bird conservation in 2009 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species') at the site:

Species	Red List	Season (year/s of estimate)	Size	IBA criteria
Swan Goose Anser cygnoid	EN	breeding (2004)	present	A1, A4i
Common Goldeneye Bucephala clangula	LC	breeding (2004)	present	A3, A4i
Ruddy Shelduck Tadorna ferruginea	LC	breeding (2004)	present	A4i
Common Pochard Aythya ferina	VU	breeding (2004)	present	A4i
Baikal Teal Sibirionetta formosa	LC	passage (2004)	present	A1
Siberian Crane Leucogeranus leucogeranus	CR	passage (2004)	present	A1, A3
Demoiselle Crane Anthropoides virgo	LC	breeding (2004)	present	A3, A4i
White-naped Crane Grus vipio	VU	breeding (2004)	present	A1, A3, A4i
Common Crane Grus grus	LC	breeding (2004)	present	A3, A4i
Hooded Crane Grus monacha	VU	breeding (2004)	present	A1, A3
Great Bustard Otis tarda	EN	breeding (2004)	present	A1, A3
Greater Spotted Eagle Clanga clanga	VU	winter (2004)	present	A1
Eastern Imperial Eagle Aquila heliaca	VU	breeding (2004)	present	A1, A3
Pallas's Fish-eagle Haliaeetus leucoryphus	EN	breeding (2004)	present	A1
Lesser Kestrel Falco naumanni	LC	breeding (2004)	present	A1
Saker Falcon Falco cherrug	EN	breeding (2009)	present	A1

Year	Protected Area	Designation (management category)	% coverage of IBA
2000	Onon - Balj /A/	National Conservation Parks (II)	40
2000	Onon - Balj river /B/	National Conservation Parks (II)	33

Habitat	% of IBA	Habitat detail
Forest	-	Forest steppe (temperate/boreal)
Grassland	-
Wetlands (inland)	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Onon-Balj (Mongolia). Downloaded from https://datazone.birdlife.org/site/factsheet/onon-balj-iba-mongolia on 26/12/2024.