Family: Sulidae (Gannets, Boobies)

Authority: (Ridgway, 1893)

Red List Category

Criteria: B2ab(ii,iii)

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Justification of Red List category
This species breeds in the limited suitable habitat of just one area of a very small island, and it has a small population which has declined rapidly owing to the effects of past habitat clearance. Recent die-back of some of the breeding habitat indicates that habitat quality continues to decline, although it is unclear whether this die-back has been caused by introduced yellow crazy ants. Because of the significance of even minimal declines in habitat quality within the limited breeding habitat of this booby, it is listed as Endangered.

Population size: 6000

Population trend: Stable

Extent of occurrence (breeding/resident): 688,000 km²

Country endemic: Yes

Attributes
Land-mass type - oceanic island
Realm - Afrotropical
Realm - Indomalayan
Realm - Oceanic
IUCN Ecosystem -- Terrestrial biome
IUCN Ecosystem -- Marine biome