Data Zone
The site was identified as internationally important for bird conservation 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 List | Season (year/s of estimate) | Size | IBA criteria |
|---|---|---|---|---|
| Tundra Swan Cygnus columbianus | LC | passage (1987) | 300 birds | A4i |
| Long-tailed Duck Clangula hyemalis | VU | passage (1993) | min 186,000 birds | A1, A4i |
| Siberian Scoter Melanitta stejnegeri | LC | passage (2009) | min 193,000 birds | A4i |
| Black Scoter Melanitta americana | NT | passage (2009) | min 255,000 birds | A1, A4i |
| Red-breasted Merganser Mergus serrator | LC | passage (2009) | min 11,000 birds | A4i |
| Greater Scaup Aythya marila | LC | passage (2009) | min 58,000 birds | A4i |
| Red-necked Stint Calidris ruficollis | NT | passage (1997) | min 5,000 birds | A4i |
| Dunlin Calidris alpina | NT | passage (1997) | min 5,000 birds | A4i |
| Slaty-backed Gull Larus schistisagus | LC | breeding (2009) | 5,000–6,000 birds | A4i |
| Slaty-backed Gull Larus schistisagus | LC | passage (2012) | 40,000–50,000 birds | A4i |
| Aleutian Tern Onychoprion aleuticus | VU | breeding (2009) | 1,000–1,400 birds | A4i |
| Steller's Sea-eagle Haliaeetus pelagicus | VU | passage (1997) | uncommon | A1 |
| A4iii Species group - waterbirds | n/a | passage (2009) | min 850,000 birds | A4iii |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| 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 23/12/2024.