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The site was identified as important in 2008 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species'):

Species	Current IUCN Red List Category	Season	Year(s)	Population estimate at site	IBA criteria met
Whooper Swan Cygnus cygnus	LC	breeding	2007	142 breeding pairs	A3
Whooper Swan Cygnus cygnus	LC	passage	2007	710 individuals	A4i
Common Goldeneye Bucephala clangula	LC	passage	2007	13,500 individuals	A4i
Common Goldeneye Bucephala clangula	LC	breeding	2007	120 breeding pairs	A3
Smew Mergellus albellus	LC	passage	2007	1,000 individuals	A4i
Smew Mergellus albellus	LC	breeding	2007	100 breeding pairs	A3
Red-breasted Merganser Mergus serrator	LC	passage	2007	170 individuals	A4i
Tufted Duck Aythya fuligula	LC	passage	2007	82,140 individuals	A4i
Eurasian Wigeon Mareca penelope	LC	breeding	2007	3,145 breeding pairs	A3
Eurasian Wigeon Mareca penelope	LC	passage	2007	7,922 individuals	A4i
Northern Pintail Anas acuta	LC	passage	2007	13,500 individuals	A4i
Horned Grebe Podiceps auritus	VU	breeding	2007	180 breeding pairs	A3
Corncrake Crex crex	LC	breeding	2007	30 breeding pairs	A1
Little Gull Hydrocoloeus minutus	LC	breeding	2007	4,330 breeding pairs	A4i
Black-headed Gull Larus ridibundus	LC	breeding	2007	3,470 breeding pairs	A4i
Black-headed Gull Larus ridibundus	LC	passage	2007	9,745 individuals	A4i
Common Tern Sterna hirundo	LC	breeding	2007	2,640 breeding pairs	A4i
Common Tern Sterna hirundo	LC	passage	2007	1,470 individuals	A4i
A4iii Species group - waterbirds	n/a	passage	2007	20,000 individuals	A4iii

The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2008).

Pressure (threats to the trigger species and/or their habitats)
Threat level 1	Threat level 2	Timing	Scope	Severity	Result
Biological resource use	hunting & collecting terrestrial animals - intentional use (species being assessed is the target)	happening now	some of area/population (10-49%)	slow but significant deterioration	medium
Energy production and mining	oil and gas drilling	likely in short term (within 4 years)	small area/few individuals (<10%)	moderate to rapid deterioration	low
Residential and commercial development	commercial and industrial development	likely in short term (within 4 years)	small area/few individuals (<10%)	slow but significant deterioration	low

Response (conservation actions taken for the trigger species and/or their habitats)
Protected-area designation	Management planning	Other conservation action	Result
Some of site covered (10-49%)	No management planning has taken place	Very little or no conservation action taking place	negligible

For more information about IBA conservation status, please click here

Protected area (PA)	PA designation	PA area (ha)	Relationship of PA with IBA	Overlap of PA with IBA (ha)
Upper Dvuobje	Ramsar Site, Wetland of International Importance	470,000	protected area overlaps with site	0
Elizarovsky	Zakaznik (Federal)	76,600	protected area contained by site	76,600

Habitat (IUCN level 1)	Habitat detail	Extent (% of site)
Wetlands (inland)	Fens, transition mires & springs, Rivers & streams, Standing fresh water	-
Grassland	Humid	-
Forest	Flood-plain, Native coniferous	-
Shrubland		-

For more information about the IUCN Habitat classification, please click here.

Land-use	Extent (% of site)
fisheries/aquaculture	-
hunting	-
rangeland/pastureland	-
forestry	-
urban/industrial/transport	-
not utilised	-
nature conservation and research	-
energy production and mining	-

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Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Upper streams of Ob' river. Downloaded from http://datazone.birdlife.org/site/factsheet/upper-streams-of-ob-river-iba-russia-(central-asian) on 30/09/2023.