Data Zone
The site was identified as internationally important for bird conservation in 2020 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 |
|---|---|---|---|---|
| Tropical Shearwater Puffinus bailloni | LC | breeding (2008–2018) | 1,615 pairs | A4 |
| Red-footed Booby Sula sula | LC | breeding (2008–2018) | 5,469 pairs | A4 |
| Brown Noddy Anous stolidus | LC | breeding (2004) | 28,700 pairs | A4 |
| Lesser Noddy Anous tenuirostris | LC | breeding (2008–2018) | 15,735 pairs | A4 |
| Sooty Tern Onychoprion fuscatus | LC | breeding (2008–2018) | 52,000 pairs | A4 |
| A4iii Species group - seabirds | n/a | breeding (2004) | 30,000–39,999 birds | B3b |
| A4iii Species group - waterbirds | n/a | breeding (2008–2018) | min 20,000 birds | B3b |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Western Great Chagos Bank island group (British Indian Ocean Territory). Downloaded from
https://datazone.birdlife.org/site/factsheet/western-great-chagos-bank-island-group-iba-british-indian-ocean-territory on 23/12/2024.