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Also known as the Hawaiian Duck.
From the series of thirty-three prints, Living Endemic Birds of Hawaii, by Marian Berger.
From en.wikipedia.org: "The Hawaiian Duck (Anas wyvilliana) is a species of bird in the family Anatidae. It is endemic to the large islands of Hawai'i. Some authorities treat it as an island subspecies of the Mallard, based on their capacity to produce fertile hybrids, but it appears well distinct and capability of hybridization is meaningless in dabbling duck taxonomy. The native Hawaiian name for this duck is koloa maoli." Endangered due to predation, interbreeding with feral mallards, and pollution.
The Hawaiian duck is a close relative of the mallard and one of only three endemic waterfowl species in the Hawaiian Islands today. It was once a common inhabitant of all the main islands and was hunted for sport. Ornithologists began to notice the species' decline in the early 1920s, and it disappeared from all islands but Kauai and Ni'ihau by 1962. It has been reintroduced to Oahu, Hawaii, and Maui, but remains listed as critically endangered due to extreme population fluctuations within its extremely small range."
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