Red List Category
for more information about the Red List categories and criteria
Justification of Red List category
This species qualifies as Vulnerable because it has a very small range, being confined to one very small island and one tiny islet, and it is therefore susceptible to stochastic events and human impacts.
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 - Oceanic - realm
IUCN Ecosystem -- Terrestrial biome
IUCN Ecosystem -- Marine biome