EN
Hawaiian Duck Anas wyvilliana



Family: Anatidae (Ducks, Geese, Swans)

Authority: Sclater, 1878

Red List Category

Criteria: B1ab(ii,iii,iv,v)

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Justification of Red List category
This species qualifies as Endangered because it is inferred to have a very small and fragmented range on a few islands, where wetlands are being lost and degraded, and where hybridisation is slowly reducing the number of pure individuals.



Population size: 1500

Population trend: Decreasing

Extent of occurrence (breeding/resident): 45,900 km2

Country endemic: Yes

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

Recommended citation
BirdLife International (2018) Species factsheet: Anas wyvilliana. Downloaded from http://www.birdlife.org on 15/12/2018. Recommended citation for factsheets for more than one species: BirdLife International (2018) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 15/12/2018.