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 degraded through grazing by feral goats, with an imminent threat from feral deer posing a new pressure. It remains at risk from the effects of exotic taxa. A particular concern is the possible introduction of a disease-carrying mosquito species tolerant of the cooler climate at higher altitudes, thereby bringing currently safe populations of birds into contact with lethal diseases.
3800 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