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The site was identified as internationally important for bird conservation in 2004 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
Siberian Grouse Falcipennis falcipennis	NT	resident (1998)	present	A3
Black-billed Capercaillie Tetrao urogalloides	LC	resident (1998)	present	A3
Swan Goose Anser cygnoid	EN	breeding (1978–1981)	40–150 pairs	A1, A4i
Lesser White-fronted Goose Anser erythropus	VU	passage (1979)	14 birds	A1, A4i
Common Goldeneye Bucephala clangula	LC	passage (1998)	present	A4i
Scaly-sided Merganser Mergus squamatus	EN	breeding (1998)	present	A1, A3
Mandarin Duck Aix galericulata	LC	breeding (1998)	present	A3
Common Pochard Aythya ferina	VU	breeding (1998)	present	A4i
Baikal Teal Sibirionetta formosa	LC	breeding (1998)	present	A1
Falcated Duck Mareca falcata	LC	breeding (1998)	present	A3
Eurasian Wigeon Mareca penelope	LC	breeding (1998)	present	A3
Hooded Crane Grus monacha	VU	breeding (1979–1980)	1 pairs	A1, A3
Schrenck's Bittern Ixobrychus eurhythmus	LC	passage (1998)	present	A4i
Pin-tailed Snipe Gallinago stenura	LC	breeding (1998)	present	A3
Green Sandpiper Tringa ochropus	LC	breeding (1998)	present	A3
Common Greenshank Tringa nebularia	LC	breeding (1998)	present	A3
Eurasian Pygmy-owl Glaucidium passerinum	LC	resident (1998)	present	A3
Great Grey Owl Strix nebulosa	LC	resident (1998)	present	A3
Blakiston's Eagle-owl Bubo blakistoni	EN	resident (1998)	present	A1, A3
Steller's Sea-eagle Haliaeetus pelagicus	VU	resident (1978–1989)	7–8 pairs	A1, A3
Ashy Minivet Pericrocotus divaricatus	LC	breeding (1998)	present	A3
Siberian Jay Perisoreus infaustus	LC	resident (1998)	present	A3
Lanceolated Warbler Locustella lanceolata	LC	breeding (1998)	present	A3
Locustella fasciolata	NR	breeding (1998)	present	A3
Radde's Warbler Phylloscopus schwarzi	LC	breeding (1998)	present	A3
Pale-legged Leaf-warbler Phylloscopus tenellipes	LC	breeding (1998)	present	A3
Arctic Warbler Phylloscopus borealis	LC	breeding (1998)	present	A3
Chestnut-flanked White-eye Zosterops erythropleurus	LC	breeding (1998)	present	A3
White-cheeked Starling Spodiopsar cineraceus	LC	breeding (1998)	present	A3
Grey-backed Thrush Turdus hortulorum	LC	breeding (1998)	present	A3
Siberian Blue Robin Larvivora cyane	LC	breeding (1998)	present	A3
Rufous-tailed Robin Larvivora sibilans	LC	breeding (1998)	present	A3
Yellow-rumped Flycatcher Ficedula zanthopygia	LC	breeding (1998)	present	A3
Mugimaki Flycatcher Ficedula mugimaki	LC	breeding (1998)	present	A3
White-throated Rock-thrush Monticola gularis	LC	breeding (1998)	present	A3
Bohemian Waxwing Bombycilla garrulus	LC	breeding (1998)	present	A3
Japanese Waxwing Bombycilla japonica	NT	breeding (1998)	present	A3
Brambling Fringilla montifringilla	LC	breeding (1998)	present	A3
Chinese Grosbeak Eophona migratoria	LC	breeding (1998)	present	A3
Japanese Grosbeak Eophona personata	LC	breeding (1998)	present	A3
Pallas's Rosefinch Carpodacus roseus	LC	breeding (1998)	present	A3
Pine Grosbeak Pinicola enucleator	LC	breeding (1998)	present	A3
Two-barred Crossbill Loxia leucoptera	LC	breeding (1998)	present	A3
Pallas's Bunting Emberiza pallasi	LC	breeding (1998)	present	A3
Yellow-breasted Bunting Emberiza aureola	CR	breeding (1998)	present	A3
Rustic Bunting Emberiza rustica	VU	breeding (1998)	present	A3
Chestnut Bunting Emberiza rutila	LC	breeding (1998)	present	A3
Tristram's Bunting Emberiza tristrami	LC	breeding (1998)	present	A3

Year	Protected Area	Designation (management category)	% coverage of IBA
-	Ostrov Krachiy	Nature Monument (III)	-
1988	Udyl'	Zakaznik (Federal) (IV)	25

Habitat	% of IBA	Habitat detail
Forest	-	Coniferous forest (temperate/boreal)
Shrubland	-
Wetlands (inland)	-	Freshwater lakes and pools; Riverine floodplains

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Udyl' lake (Russia (Asian)). Downloaded from https://datazone.birdlife.org/site/factsheet/udyl-lake-iba-russia-(asian) on 22/12/2024.