RU3064
Forty Islands


IBA Justification

The site was identified as important in 2004 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species'):
Species Red List Category Season Year(s) Population estimate at site IBA criteria met
Black-billed Capercaillie Tetrao urogalloides LC resident 1999 present A3
Whooper Swan Cygnus cygnus LC breeding 1976-1982 1,599-2,650 individuals A3
Tundra Swan Cygnus columbianus LC passage 1999 present A4i
Brent Goose Branta bernicla LC passage 1975 661 individuals A4i
Bean Goose Anser fabalis LC passage 1976-1982 1,500-9,800 individuals A4i
Greater White-fronted Goose Anser albifrons LC passage 1975-1982 2,200-6,100 individuals A4i
Lesser White-fronted Goose Anser erythropus VU passage 1999 uncommon A1, A4i
Siberian Scoter Melanitta stejnegeri LC passage 1976 5,500 individuals A4i
Common Goldeneye Bucephala clangula LC breeding 1976-1982 100-140 individuals A3, A4i
Smew Mergellus albellus LC breeding 1976-1982 150-350 individuals A3, A4i
Red-breasted Merganser Mergus serrator LC breeding 1999 present A4i
Tufted Duck Aythya fuligula LC breeding 1976-1982 common A4i
Northern Shoveler Spatula clypeata LC breeding 1976-1982 700-1,700 individuals A4i
Baikal Teal Sibirionetta formosa LC breeding 1976-1982 110-960 individuals A1, A4i
Falcated Duck Mareca falcata NT breeding 1975-1982 150-250 individuals A3, A4i
Eurasian Wigeon Mareca penelope LC breeding 1976-1982 2,900-6,600 individuals A3, A4i
Northern Pintail Anas acuta LC breeding 1976-1982 5,500-11,000 individuals A4i
Anas crecca NR breeding 2004 present A4i
Common Crane Grus grus LC breeding 1999 present A3, A4i
Red-throated Loon Gavia stellata LC breeding 1999 present A4i
Arctic Loon Gavia arctica LC breeding 1999 present A4i
Far Eastern Curlew Numenius madagascariensis EN breeding 1982 300 breeding pairs A3
Pin-tailed Snipe Gallinago stenura LC breeding 1999 present A3
Terek Sandpiper Xenus cinereus LC breeding 1999 present A3
Common Sandpiper Actitis hypoleucos LC breeding 1999 present A4i
Green Sandpiper Tringa ochropus LC breeding 1999 present A3, A4i
Common Greenshank Tringa nebularia LC breeding 1999 present A3, A4i
Wood Sandpiper Tringa glareola LC breeding 1999 present A4i
Northern Hawk-owl Surnia ulula LC resident 1999 present A3
Great Grey Owl Strix nebulosa LC resident 1999 present A3
Siberian Jay Perisoreus infaustus LC resident 1999 present A3
Siberian Tit Poecile cinctus LC resident 1999 present A3
Lanceolated Warbler Locustella lanceolata LC breeding 1999 present A3
Arctic Warbler Phylloscopus borealis LC breeding 1999 present A3
Siberian Thrush Geokichla sibirica LC breeding 1999 present A3
Eyebrowed Thrush Turdus obscurus LC breeding 1999 present A3
Turdus naumanni NR breeding 1999 present A3
Bohemian Waxwing Bombycilla garrulus LC breeding 1999 present A3
Siberian Accentor Prunella montanella LC breeding 1999 present A3
Brambling Fringilla montifringilla LC breeding 1999 present A3
Pallas's Rosefinch Carpodacus roseus LC breeding 1999 present A3
Pine Grosbeak Pinicola enucleator LC breeding 1999 present A3
Two-barred Crossbill Loxia leucoptera LC resident 1999 present A3
Pallas's Bunting Emberiza pallasi LC breeding 1999 present A3
Yellow-breasted Bunting Emberiza aureola CR breeding 1999 present A3
Rustic Bunting Emberiza rustica VU breeding 1999 present A3
Little Bunting Emberiza pusilla LC breeding 1999 present A3
Yellow-browed Bunting Emberiza chrysophrys LC breeding 1999 present A3
A4iii Species group - waterbirds n/a breeding 1975-1982 11,000-22,000 individuals A4iii

The current IUCN Red List category (shown above) may differ from that which was valid at the time of IBA criteria assessment (2004).


IBA Protection

Protected area (PA) PA designation PA area (ha) Relationship of PA with IBA Overlap of PA with IBA (ha)
Ust'-Viljujskiy Zakaznik 1,016,000 protected area overlaps with site 342,804

Habitats

Habitat (IUCN level 1) Habitat detail Extent (% of site)
Wetlands (inland) -
Grassland Edaphic grassland -
Shrubland -
Forest Coniferous forest (temperate/boreal) -
For more information about the IUCN Habitat classification, please click here.


Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Forty Islands. Downloaded from https://datazone.birdlife.org/site/factsheet/forty-islands-iba-russia-(asian) on 19/03/2024.