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Spix's macaw (''Cyanopsitta spixii''), also known as the little blue macaw, is a macaw native to Brazil. It is a member of Arini tribe in the subfamily Arinae (Neotropical parrots), part of the family Psittacidae (the true parrots). It was first described by German naturalist Georg Marcgrave, when he was working in the State of Pernambuco, Brazil in 1638 and it is named for German naturalist Johann Baptist von Spix, who collected a specimen in 1819 on the bank of the Rio São Francisco in northeast Bahia in Brazil. The bird is a medium size parrot weighing about , smaller than most of the large macaws. Its plumage is various shades of blue, with a grey-blue head, light blue underparts, and vivid blue upperparts. Males and females are almost identical in appearance, however the females are slightly smaller on average. The species inhabited riparian Caraibeira (''Tabebuia aurea'') woodland galleries in the drainage basin of the Rio São Francisco within the Caatinga dry forest climate of interior northeastern Brazil. It had a very restricted natural habitat due to its dependence on the tree for nesting, feeding and roosting. It fed primarily on seeds and nuts of Caraiba and various ''Euphorbiaceae'' (spurge) shrubs, the dominant vegetation of the Caatinga. Due to deforestation in its limited range and specialized habitat, the bird has been rare in the wild throughout the twentieth century. It has always been very rare in captivity, partly due to the remoteness of its natural range. The IUCN regard the Spix's macaw as critically endangered and possibly extinct in the wild. Its last known stronghold in the wild was in northeastern Bahia, Brazil and the last known wild bird was a male that vanished in 2000. The species is now maintained through a captive breeding program at several conservation organizations under the aegis of the Brazilian government. It is listed on CITES Appendix I, which makes trade illegal except for legitimate conservation, scientific or educational purposes. The Brazilian government department of natural resources (ICMBio) is conducting a project ''Ararinha-Azul'' with an associated plan to restore the species to the wild as soon as sufficient breeding birds and restored habitat are available. ==Taxonomy== Spix's macaw is the only known species of the genus ''Cyanopsitta''. The genus name is derived from the Ancient Greek ''kuanos'' meaning "blue" and ''psittakos'' meaning "parrot". The species name ''spixii'' is a Latinized form of the surname "von Spix", hence ''Cyanopsitta spixii'' means "blue parrot of Spix".〔 The genus ''Cyanopsitta'' is one of six genera of Central and South American macaws in the tribe Arini, which also includes all the other long-tailed New World parrots. Tribe Arini together with the short-tailed Amazon and allied parrots and a few miscellaneous genera make up subfamily Arinae of Neotropical parrots in family Psittacidae of true parrots.〔 In 1638 Georg Marcgrave was the first European naturalist to observe and describe the species; however, it is named for Johann Baptist von Spix, who collected the type specimen in April 1819 in Brazil, but gave it the misnomer ''Arara hyacinthinus'' not realizing till later that the name collided with ''Psittacus hyacinthinus'', the name assigned to the hyacinth macaw described by John Lathan in 1790. Spix's mistake was noticed in 1832 by German Professor of Zoology Johann Wagler, who realized that the 1819 specimen was smaller and a different color than the hyacinth macaw and he designated the new species as "''Sittace spixii''". It wasn't until 1854 that naturalist Prince Charles Bonaparte properly placed it in its own genus, designating the bird ''Cyanopsitta spixi'',〔Bonaparte, Charles (1854) ''Revue et magasin de zoologie pure et'' 6:149〕 based on important morphological differences between it and the other blue macaws.〔Juniper, pp. 19–23〕 It was listed as ''Cyanopsittacus spixi'' by Italian zoologist Tommaso Salvadori in his 1891 ''Catalog of the Birds in the British Museum''. Naturalists have noted the Spix similarity to other smaller members of tribe Arini based on general morphology as long ago as Rev. F.G. Dutton, president of the Avicultural Society U.K. in 1900: "it's more like a conure" ('conure' is not a defined taxon – in Dutton's time, it referred to the archaic genus ''Conurus''; today those would be among the smaller non-macaw parakeets in ''Arini''). Brazilian ornithologist Helmut Sick stated in 1981: "''Cyanopsitta spixii''...is not a real macaw". (Sick's remark was in the context of an article on ''Lear's macaw'', a larger blue macaw. He recognized, as Spix had not 150 years before, that ''C. spixii'' is notably different from the larger macaws). The morphology-based taxonomy of ''C. spixii'', intermediate between the macaws and the smaller Arini, has been confirmed by recent molecular phylogenetic studies. In a 2008 molecular phylogenetic study of 69 parrot genera, the clade diagrams indicate that ''C. spixii'' split from the ancestral parakeets before the differentiation of the modern macaws. However, not all of the macaw genera were represented in the study. The study also states that diversification of the Neotropical parrot lineages occurred starting 33 mya, a period roughly coinciding with the separation of South America from West Antarctica. The author notes that the study challenges the classification of British ornithologist Nigel Collar in the encyclopedic ''Handbook of the Birds of the World'', volume 4 (1997). A 2011 study by the same authors which includes key genera of macaws further elucidates the macaw taxonomy: the clade diagram of that study places ''C. spixii'' in a clade including the macaw genera which is sister to a clade containing the ''Aratinga''s and other smaller parakeets. Within the macaw clade, ''C. spixii'' was the first taxon to diverge from the ancestral macaws; its nearest relatives are the red-bellied macaw (''Orthopsittaca manilata'') and the blue-headed macaw (''Primolius couloni''). 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「Spix's macaw」の詳細全文を読む スポンサード リンク
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