Red List Category
for more information about the Red List categories and criteria
Justification of Red List category
This species may still have an extremely small pure-bred adult population and it is therefore precautionarily considered Endangered. Its possible extirpation through hybridisation has been averted owing to three decades of conservation efforts, but present population trends are poorly known. It is restricted to one location (given the proximity of the tiny islands it inhabits, and its mobility), and therefore any decline would warrant uplisting it to Critically Endangered. Conversely, confirmation of apparent increases in recent years may result in downlisting in the near future.
50-249 mature individuals
Distribution size (breeding/resident):
Land-mass type - oceanic island - Oceanic islands are islands or island groups that are <200,000 sq km in size and separated from other land masses by >200 m sea depth. Generally Oceanic islands are islands or island groups that are <200,000 sq km in size and separated from other land masses by >200 m sea depth. Generally they have never been connected to a continental area by a land-ridge, and are volcanic in origin.
Realm - Oceanic - realm
IUCN Ecosystem -- Terrestrial biome