Red List Category
for more information about the Red List categories and criteria
Justification of Red List category
This species qualifies as Vulnerable owing to its very small breeding range, which renders it susceptible to stochastic events and human impacts. Confirmation that introduced predators are causing a decline may qualify it for uplisting to Critically Endangered.
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 - Nearctic - realm
Realm - Neotropical - realm
Realm - Oceanic - realm
Realm - Palearctic - realm
IUCN Ecosystem -- Terrestrial biome
IUCN Ecosystem -- Marine biome