Data Zone
The site was identified as important in 2016 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 List1 | Season | Year(s) | Size | IBA criteria |
|---|---|---|---|---|---|
| Tundra Swan Cygnus columbianus | LC | passage | 1987 | 300 individuals | A4i |
| Long-tailed Duck Clangula hyemalis | VU | passage | 1993 | min 186,000 individuals | A1, A4i |
| Siberian Scoter Melanitta stejnegeri | LC | passage | 2009 | min 193,000 individuals | A4i |
| Black Scoter Melanitta americana | NT | passage | 2009 | min 255,000 individuals | A1, A4i |
| Red-breasted Merganser Mergus serrator | LC | passage | 2009 | min 11,000 individuals | A4i |
| Greater Scaup Aythya marila | LC | passage | 2009 | min 58,000 individuals | A4i |
| Red-necked Stint Calidris ruficollis | NT | passage | 1997 | min 5,000 individuals | A4i |
| Dunlin Calidris alpina | NT | passage | 1997 | min 5,000 individuals | A4i |
| Slaty-backed Gull Larus schistisagus | LC | breeding | 2009 | 5,000-6,000 individuals | A4i |
| Slaty-backed Gull Larus schistisagus | LC | passage | 2012 | 40,000-50,000 individuals | A4i |
| Aleutian Tern Onychoprion aleuticus | VU | breeding | 2009 | 1,000-1,400 individuals | A4i |
| Steller's Sea-eagle Haliaeetus pelagicus | VU | passage | 1997 | uncommon | A1 |
| A4iii Species group - waterbirds | n/a | passage | 2009 | min 850,000 individuals | A4iii |
1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2016) may differ.
| Habitat1 | Habitat detail | % of IBA |
|---|---|---|
| Marine Coastal/Supratidal | major (>10) | |
| Marine Intertidal | major (>10) |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Bol'shaya River Estuary (Russia (Asian)). Downloaded from
https://datazone.birdlife.org/site/factsheet/bolshaya-river-estuary-iba-russia-(asian) on 22/11/2024.