Red List Category
for more information about the Red List categories and criteria
Justification of Red List category
This species appears to have declined very rapidly on its main breeding island, possibly associated with the impacts of Hurricane Iniki in 1992, and continues to decline, with two colonies known of in the early 1980s, and possibly a third, now abandoned. Combined with longer term declines owing to a number of other threats, it qualifies as 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 - Oceanic - realm
Realm - Nearctic - realm
IUCN Ecosystem -- Terrestrial biome
IUCN Ecosystem -- Marine biome