Red List Category
for more information about the Red List categories and criteria
Justification of Red List category
This species is judged to be Vulnerable on the basis of an estimated small population which is likely to be declining through habitat loss and degradation. However, researching its population size, tolerance of habitat changes and dispersal between subpopulations may lead to reclassification.
2500-9999 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 -- Freshwater biome
IUCN Ecosystem -- Terrestrial biome