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The site was identified as important 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 List1	Season	Year(s)	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

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2009) may differ.

Year	Protected Area	Designation	% overlap with IBA
2000	Onon - Balj /A/	National Conservation Parks	40
2000	Onon - Balj river /B/	National Conservation Parks	33

Habitat1	Habitat detail	% of IBA
Forest	Forest steppe (temperate/boreal)	-
Grassland		-
Wetlands (inland)		-

1. IUCN Habitat classification.

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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 25/11/2024.