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).
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 |
Habitat (IUCN level 1) | Habitat detail | Extent (% of site) |
---|---|---|
Wetlands (inland) | - | |
Grassland | Edaphic grassland | - |
Shrubland | - | |
Forest | Coniferous forest (temperate/boreal) | - |
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.