Data Zone
Justification of Red List Category
This species was endemic to the island of St Helena, but is thought to have been hunted to extinction shortly after the island's discovery in 1502.
Population justification
None remain.
Bulweria bifax was a large petrel, known only from fossils and endemic to St Helena (to UK). It probably became extinct shortly after the discovery of the island in 1502 (Olson 1975b).
It may have bred throughout the island and foraged over the open ocean.
Predation by people and introduced predators is likely to have driven it to extinction.
Text account compilers
Brooks, T., Khwaja, N., Mahood, S., Martin, R
Recommended citation
BirdLife International (2023) Species factsheet: Bulweria bifax. Downloaded from
http://www.birdlife.org on 30/03/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 30/03/2023.
