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A photo of a Hawaiian Duck (Anas wyvilliana), male
Hawaiian Duck, Male

Hawaiian Duck

Anas wyvilliana

The Hawaiian duck (Anas wyvilliana) or koloa is a species of bird in the family Anatidae that is endemic to the large islands of Hawaiʻi. Taxonomically, the koloa is closely allied with the mallard (A. platyrhynchos). It differs in that it is monochromatic (with similarly marked males and females) and non-migratory. As with many duck species in the genus Anas, Hawaiian duck and mallards can interbreed and produce viable offspring, and the koloa has previously been considered an island subspecies of the mallard. However, all major authorities now consider this form to be a distinct species within the mallard complex. Recent analyses indicate that this is a distinct species that arose through ancient hybridization between mallard and Laysan duck (Anas laysanensis). The native Hawaiian name for this duck is koloa maoli (meaning "native duck"), or simply koloa. This species is listed as endangered by the IUCN Red List of Threatened Species, and its population trend is decreasing.
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Hawaiian Ducks on Birda

Photos

Sightings

A photo of a Hawaiian Duck photographed in Bridge United States
Profile picture for Winnie Poon
Winnie Poon
Tuesday 30 May 2023 - 12:05am
United States
A map showing the sighting location
🐓
Jeremy Lohn
Tuesday 25 Apr 2023 - 6:57pm
United States
A photo of a Hawaiian Duck photographed in King Kamehameha Golf Club United States
🦕
Andy Estrada
Wednesday 22 Mar 2023 - 5:18am
United States
A map showing the sighting location
🦃
Michael Thompson
Thursday 26 Jan 2023 - 12:46am
United States

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