Red List Category
for more information about the Red List categories and criteria
Justification of Red List category
This species is listed as Critically Endangered because habitat within its extremely small range is being seriously degraded by introduced feral ungulates. Much of its range is now fenced so may be adequately protected from this threat, although the species remains at risk from chance environmental events, such as hurricanes, as well as habitat degradation and the effects of exotic taxa.
250-540 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