Anas strepera   (L.)


 
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Coues' Gadwall
(Anas strepera couesi (Streets))

 
syn. Chaulelasmus couesi (Streets)

 
distribution:

Kiribati: Teraina / Line Islands

 
local name: -

 
size: 46 - 55 cm (length)

extinction date: sometimes after 1874

 
The actual Gadwall (Anas strepera (L.)) is a quite scarce winter visitor to the Hawaiian Islands, and to the Line Islands, where in the course of time obviously even a distinct population - named Coues' Gadwall - has evolved, at least on the island of Teraina.

This duck form is known from just two specimens, a male and a female, which both were shot in the year 1874 on the former lagoon of Teraina, which now is a freshwater lake.

Coues' Gadwall probably also occurred on other islands of the archipelago, but unfortunately there is no evidence therefor.

 
 
above:

Coues' Gadwall (Anas strepera couesi); bird on the right


Depiction from: 'John C. Phillips: A Natural History of the Ducks. Boston; Houghton Mifflin Company; 1922-1926'

http://www.biodiversitylibrary.org

 
References:

- Dieter Luther: Die ausgestorbenen Vögel der Welt. Westarp Wissenschaften 1986
- Steve Madge; Hilary Burn: Waterfowl: An identification guide to the Ducks, Geese and Swans of the World. Houghton Mifflin, Boston. 1988