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Macaws are long-tailed, often colourful New World parrots. == Biology == Of the many different Psittacidae (true parrots) genera, six are classified as macaws: ''Ara'', ''Anodorhynchus'', ''Cyanopsitta'', ''Primolius'', ''Orthopsittaca'', and ''Diopsittaca''. Previously, the members of the genus ''Primolius'' were placed in ''Propyrrhura'', but the former is correct in accordance with ICZN rules.〔(South American Classification Committee ) To reassign the genus of three macaws.〕 Macaws are native to Central America and North America (only México), South America, and formerly the Caribbean. Most species are associated with forests, especially rainforests, but others prefer woodland or savannah-like habitats.〔Abramson, J., Speer, B. L., & Thomsen, J.B. 1999, "The Large Macaws, Their Care and Breeding", Raintree Publications:CA〕 Proportionately larger beaks, long tails, and relatively bare, light-coloured, medial (facial patch) areas distinguish macaws from other parrots. Sometimes the facial patch is smaller in some species, and limited to a yellow patch around the eyes and a second patch near the base of the beak in the members of the genus ''Anodorhynchus''. A macaw's facial feather pattern is as unique as a fingerprint. The largest macaws are the hyacinth, Buffon's (great green) and green-winged macaws. While still relatively large, macaws of the genera ''Cyanopsitta'', ''Orthopsittaca'' and ''Primolius'' are significantly smaller than the members of ''Anodorhynchus'' and ''Ara''. The smallest member of the family, the red-shouldered macaw, is no larger than some parakeets of the genus ''Aratinga''.〔 Macaws, like other parrots, toucans and woodpeckers, are zygodactyl, having their first and fourth toes pointing backward.〔 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「Macaw」の詳細全文を読む スポンサード リンク
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