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''Ramphastos'' is a genus of toucans, tropical and subtropical near passerine birds from Mexico, and Central and South America, which are brightly marked and have enormous, often colourful, bills.〔Short, L. L., & Horne, J. F. M. (2002). Toucans (Ramphastidae). pp. 220-272 in del Hoyo, J., Elliott, A., & Sargatal, J. eds. (2002). ''Handbook of the Birds of the World.'' Vol. 7 Jacamars to Woodpecker. Lynx Edicions, Barcelona. ISBN 84-87334-37-7〕 This genus comprises the largest toucans, ranging from in length.〔 All have black wings, tails and thighs, but the colour of the remaining plumage depends on the exact species involved. All the species are basically fruit-eating, but will take insects and other small prey.〔 They are arboreal and nest in tree holes laying 2–4 white eggs. They are essentially resident birds, but may take part in minor, local movements (e.g., to lower altitudes in the winter).〔 The ischnoceran louse ''Austrophilopterus cancellosus'' is suspected to parasitize all species of ''Ramphastos'' toucans. Its presence has been confirmed on all species except the citron-throated toucan.〔Price, Roger D. & Weckstein, Jason D. (2005). ''The genus ''Austrophilopterus'' Ewing (Phthiraptera: Philopteridae) from toucans, toucanets, and araçaris (Piciformes: Ramphastidae).'' Zootaxa 918: 1-18. (PDF fulltext )〕 ==Species list== See also List of Ramphastos species and subspecies *Keel-billed toucan, ''Ramphastos sulfuratus'' *Choco toucan, ''Ramphastos brevis'' *Channel-billed toucan, ''Ramphastos vitellinus'' * *Citron-throated toucan, ''Ramphastos (vitellinus) citreolaemus''. * *Ariel toucan, ''Ramphastos (vitellinus) ariel'' * *Yellow-ridged toucan, ''Ramphastos (vitellinus/ariel) culminatus'' *Green-billed toucan, ''Ramphastos dicolorus'' *Black-mandibled toucan, ''Ramphastos ambiguus'' * *Chestnut-mandibled toucan, ''Ramphastos (ambiguus) swainsonii'' *White-throated toucan, ''Ramphastos tucanus'' * *Red-billed toucan, ''Ramphastos (tucanus) tucanus'' * *Cuvier's toucan, ''Ramphastos (tucanus) cuvieri'' *Toco toucan, ''Ramphastos toco'' 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「Ramphastos」の詳細全文を読む スポンサード リンク
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