Red List Category
for more information about the Red List categories and criteria
Justification of Red List category
This species is categorised as Vulnerable on the basis that it is estimated to have a very small population and breeding range. However, there are very few data on this species and on the potentially threatening processes operating at breeding colonies; were more information available this might lead to a category change.
250-999 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
IUCN Ecosystem -- Marine biome