Data Zone
The site was identified as important 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 List1 | Season | Year(s) | Size | IBA criteria |
|---|---|---|---|---|---|
| Tropical Shearwater Puffinus bailloni | LC | breeding | 2008-2018 | 1,615 breeding pairs | A4 |
| Red-footed Booby Sula sula | LC | breeding | 2008-2018 | 5,469 breeding pairs | A4 |
| Brown Noddy Anous stolidus | LC | breeding | 2004 | 28,700 breeding pairs | A4 |
| Lesser Noddy Anous tenuirostris | LC | breeding | 2008-2018 | 15,735 breeding pairs | A4 |
| Sooty Tern Onychoprion fuscatus | LC | breeding | 2008-2018 | 52,000 breeding pairs | A4 |
| A4iii Species group - seabirds | n/a | breeding | 2004 | 30,000-39,999 individuals | B3b |
| A4iii Species group - waterbirds | n/a | breeding | 2008-2018 | min 20,000 individuals | B3b |
1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2020) may differ.
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 22/11/2024.