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The site was identified as internationally important for bird conservation in 2013 because it was regularly supporting significant populations of the species listed below, meeting IBA criteria.

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

Species	Red List	Season (year/s of estimate)	Size	IBA criteria
Daurian Partridge Perdix dauurica	LC	breeding (2012)	4,400–6,800 breeding pairs	A3
Swan Goose Anser cygnoid	EN	breeding (2012)	5–8 breeding pairs	A1
Siberian Crane Leucogeranus leucogeranus	CR	non-breeding (2012)	2 individuals	A1
Demoiselle Crane Anthropoides virgo	LC	breeding (1990–2012)	200–1,500 breeding pairs	A3, A4i
White-naped Crane Grus vipio	VU	breeding (2012)	7–10 breeding pairs	A1, A3, A4i
Great Bustard Otis tarda	EN	breeding (2012)	30–50 females	A1, A3
Steppe Eagle Aquila nipalensis	EN	breeding (2012)	5–12 breeding pairs	A3
Saker Falcon Falco cherrug	EN	breeding (2012)	5–10 breeding pairs	A1
Mongolian Lark Melanocorypha mongolica	LC	breeding (2012)	92,000–123,000 breeding pairs	A3
Blyth's Pipit Anthus godlewskii	LC	breeding (2012)	34,000–53,000 breeding pairs	A3
Yellow-breasted Bunting Emberiza aureola	CR	breeding (2013)	35–76 breeding pairs	A1
A4iii Species group - waterbirds	n/a	passage (1990–2012)	4,000–130,000 individuals	A4iii

Year	Protected Area	Designation (management category)	% coverage of IBA
-	Ozero Khalanda	Nature Monument (III)	-
-	Mineral'nyi Istochnik Kislyi kljuch	Nature Monument (III)	-
-	Il'movaya Roscha	Nature Monument (III)	-
2003	Gornaya Step'	Zakaznik (VI)	1

Habitat	% of IBA	Habitat detail
Forest	50
Grassland	30	Steppe
Wetlands (inland)	15
Artificial/Terrestrial	5	Arable land

Land use	% of IBA
forestry	50
not utilised	50
agriculture	25
hunting	10
nature conservation and research	1

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Recommended citation
BirdLife International (2025) Important Bird Area factsheet: Middle Onon (Russia (Asian)). Downloaded from https://datazone.birdlife.org/site/factsheet/middle-onon-iba-russia-(asian) on 20/01/2025.