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Australian white ibis : ウィキペディア英語版
Australian white ibis

The Australian white ibis (''Threskiornis moluccus'') is a wading bird of the ibis family, Threskiornithidae. It is widespread across much of Australia. It has a predominantly white plumage with a bare, black head, long downcurved bill and black legs.
Historically rare in urban areas, the Australian white ibis has immigrated to urban areas of the east coast in increasing numbers since the late 1970s; it is now commonly seen in Wollongong, Sydney, Melbourne, the Gold Coast, Brisbane and Townsville. Debate continues on whether to consider it a pest or vulnerable species. Populations have disappeared from natural breeding areas such as the Macquarie Marshes in north-western New South Wales. Despite this, the species has been culled in parts of Sydney due to their smell and at times intrusive nature. Its sister species is the sacred ibis.
==Taxonomy==
It was initially described by Georges Cuvier in 1829 as ''Ibis molucca''. It is considered part of a superspecies complex with the sacred ibis (''T. aethiopicus'') of Africa, and the black-headed ibis (''T. melanocephalus'') of Asia. Its status in the complex has vacillated over the years. Many older guidebooks referred to the bird as a species ''T. molucca'', until a comprehensive review of plumage patterns by Holyoak in 1970. Holyoak noted the three species' similarities and that the Australian taxon resembled ''T. aethiopicus'' in adult plumage and ''T. melanocephalus'' in juvenile plumage. He proposed they all be considered part of a single species ''T. aethiopicus''. This was generally accepted by the scientific community until Lowe and Richards's assessment of plumage in 1991. They again recommended the recognition of ''molucca'' at species level. This was followed by chromosome study which highlighted each of the three species having a different karyotype. The Australian white ibis has been considered a full species by most authorities since then.
Alternate colloquial names include "bin chicken", "dump chook", "trash vulture", or "tip turkey", from its habit of rummaging in garbage,〔 and "sheep-bird". It was known as ''mardungurra'' among the Yindjibarndi people of the central and western Pilbara.

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