Family: Anatidae (Ducks, Geese, Swans)

Authority: (Gmelin, 1789)

Red List Category

Criteria: C2a(i)

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Justification of Red List category
This species has a small population that is inferred to be declining primarily due to the effects of introduced predators, with no subpopulation exceeding 250 mature individuals. It is therefore classified as Endangered.

Population size: 1500-2499

Population trend: Decreasing

Extent of occurrence (breeding/resident): 199,000 km²

Country endemic: Yes

Attributes
Land-mass type - oceanic island
Realm - Oceanic
IUCN Ecosystem -- Freshwater biome
IUCN Ecosystem -- Terrestrial biome