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The Auckland merganser or Auckland Islands merganser (''Mergus australis'') was a typical merganser which is now extinct. This duck was similar in size to the red-breasted merganser. The adult male had a dark reddish-brown head, crest and neck, with bluish black mantle and tail and slate grey wings. The female was slightly smaller with a shorter crest. This bird was first collected when a French expedition led by the explorer Jules Dumont d'Urville on the ships ''L'Astrolabe'' and ''La Zelee'' visited the Auckland Islands in 1840. Its decline was caused by a combination of hunting and predation by introduced mammals. The bird was not flightless, but rather hard to flush; it preferred to hide between rocks when pursued. The last sighting was of a pair shot on January 9, 1902. It was not found in a 1909 search, and a thorough 1972/1973 exploration of possible habitat concluded that it was long extinct (Williams & Weller, 1974). Subsequent fossil discoveries suggest that this merganser was previously resident on the South Island and Stewart Island/Rakiura in New Zealand. Fossils of a subspecies or closely related species have also been found on the Chatham Islands. There exists a short remark mentioning "a merganser" found on Campbell Island in McCormick (1842), but this may just as well refer to the semi-marine Campbell teal which is otherwise missing in his notes: he only mentions the Pacific black duck ("a New Zealand species of duck"). ==References== * McCormick, Robert (1842): A sketch of the Antarctic regions, embracing a few passing remarks, geographical and ornithological. ''Tasmanian Journal of Natural Sciences'' 1(4): 241-247. (PDF fulltext ) * Williams, G. R. & Weller, M. W.. (1974): Unsuccessful search for the Auckland Islands Merganser (''Mergus australis''). ''Notornis'' 21(3): 246-249. (PDF fulltext ) * (''Southern Merganser. Mergus australis''. ) by Paul Martinson. Artwork produced for the book ''Extinct Birds of New Zealand'', by Alan Tennyson, Te Papa Press, Wellington, 2006 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Auckland merganser」の詳細全文を読む スポンサード リンク
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