Data Zone
The site was identified as important in 2015 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 |
|---|---|---|---|---|---|
| Red-billed Tropicbird Phaethon aethereus | LC | breeding | 1959 | 500 breeding pairs | A4ii |
| White-tailed Tropicbird Phaethon lepturus | LC | breeding | 1959 | 1,000 breeding pairs | A4ii |
| Band-rumped Storm-petrel Hydrobates castro | LC | breeding | 1958-1959 | 3,000 individuals | A4ii |
| Ascension Frigatebird Fregata aquila | VU | breeding | 2001-2002 | 12,500 individuals | A1, A4ii |
| Masked Booby Sula dactylatra | LC | breeding | 2001-2002 | 9,000-9,332 individuals | A4ii |
| Atlantic White Tern Gygis alba | LC | breeding | 2015 | min 854 individuals | A4i |
| A4iii Species group - seabirds | n/a | breeding | 2001-2002 | 20,000-49,999 individuals | A4iii |
1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2015) may differ.
| Year | Protected Area | Designation | % overlap with IBA |
|---|---|---|---|
| 2014 | Boatswain Bird Island Sanctuary | Sanctuary | 100 |
| 2014 | Boatswainbird Island Protected Area - Nature Sanctuary | Other | 100 |
| Land use | % of IBA |
|---|---|
| fisheries/aquaculture | - |
| nature conservation and research | - |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Boatswainbird Island (St Helena (to UK)). Downloaded from
https://datazone.birdlife.org/site/factsheet/boatswainbird-island-iba-st-helena-(to-uk) on 22/11/2024.