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:''This page is about the species of parrot. For the genus of parrots, see Rhynchopsitta''. The thick-billed parrot (''Rhynchopsitta pachyrhyncha'') is a medium-sized green and red parrot found in Mexico, that formerly ranged into the southwestern United States. Its position in parrot phylogeny is the subject of ongoing discussion; it is sometimes referred to as thick-billed macaw or thick-billed conure. In Mexico, it is locally called ''guacamaya'' ("macaw") or ''cotorra serrana'' ("mountain parrot"). Classified internationally as Endangered through IUCN,〔 the thick-billed parrot's decline has been central to multiple controversies over wildlife management. ==Taxonomy== ''Pachyrhyncha'' is currently classified as a species of the genus ''Rhynchopsitta'' of macaw-like thick-billed parrots of which there are two extant species (the other being the maroon-fronted parrot), and one extinct species. However, recent molecular DNA studies indicate that ''pachyrhyncha'' and its sister species ''terrisi'' in genus ''Rhynchopsitta'' are conspecific subspecies. ''Rhynchopsitta'' is one of numerous genera of New World long-tailed parrots in tribe Arini, which also includes the Central and South American macaws. Tribe Arini together with the amazonian parrots and a few miscellaneous genera make up subfamily Arinae of Neotropical parrots in the family Psittacidae of the true parrots. The bird was first described by English naturalist and illustrator William John Swainson who designated it ''Macrocercus pachyrhynchus'' in ''Philosophical Magazine'', new ser., 1, no. 6, p. 439 (1827). Swainson evidently thought that because of its size and heavy beak, that it was a macaw (at that time, any parrot of the genus ''Sittace'', or ''Macrocercus''). It was later placed in its own genus ''Rhynchopsitta'' by French naturalist Prince Charles Bonaparte in 1854. The name is derived from Ancient Greek ''rhynchos'' ("beak") and ''psittakos'' ("parrot") and Greek ''pachy-'' ("thick") and ''rhynchos'' ("beak"), hence a "thick-beaked parrot". Morphologically, Brazilian ornithologist Helmut Sick calls this bird "a highly modified macaw". In a recent molecular study, genus ''Rhynchopsitta'' was placed in a large clade including all of tribe Arini and a few other genera; its closest relatives were similar in size to the parakeets in ''Enicognathus'', ''Pyrrhura'', ''Pionites'', and ''Deroptyus'' genera of the clade. In a separate molecular analysis in the same study, ''Rhynchopsitta'' was placed in a clade in which it was sister to ''Pyrrhura'' but not other genera. 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「Thick-billed parrot」の詳細全文を読む スポンサード リンク
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