Hawaiian Duck Anas wyvilliana

Family: Anatidae (Ducks, Geese, Swans)

Authority: Sclater, 1878

Red List Category

Criteria: D1

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Justification of Red List category
This species has a very small population size, estimated to number less than 1,000 mature individuals. It is therefore assessed as Vulnerable.

Population size: 700-999 mature individuals

Population trend: increasing

Extent of occurrence (breeding/resident): 2,800 km2

Country endemic: yes

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

Recommended citation
BirdLife International (2024) Species factsheet: Anas wyvilliana. Downloaded from on 05/03/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from on 05/03/2024.