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Vegetarian finch
The vegetarian finch (''Platyspiza crassirostris'') is a species of bird in the Darwin's finch group of the tanager family Thraupidae. It is monotypic within the genus ''Platyspiza''. It is endemic to the Galápagos Islands. Its natural habitats are subtropical or tropical dry forests and subtropical or tropical moist montane forests.
==Systematics==
The vegetarian finch is one of Darwin's finches, a group of closely related birds which evolved on the Galápagos Islands. The group is related to the ''Tiaris'' grassquits, which are found in South America and the Caribbean.〔 An ancestral relative of those grassquits arrived on the Galápagos Islands some 2–3 million years ago, and the vegetarian finch is an early evolutionary radiation from that ancestor.〔Grant & Grant (2008), p. 25.〕
When Darwin first collected the species in 1835, he assumed it was a finch. John Gould, who formally described the vegetarian finch in 1837, agreed and assigned it to the genus ''Fringilla''. By 1841, Gould had changed his mind, and moved the species to the genus ''Camarhynchus'', lumping it with the ground and cactus finches.〔 Robert Ridgway separated it from the other species in 1896, assigning it to a new genus ''Platyspiza''.〔 DNA research has now shown that all Darwin's "finches" are actually tanagers.〔
The vegetarian finch is the sole member of the genus ''Platyspiza'',〔 which some taxonomists still subsume into the genus ''Camarhynchus''.〔 The genus name ''Platyspiza'' comes from the Greek ''platus'', meaning "broad" and ''spiza'', meaning "finch".〔 The specific name ''crassirostris'' comes from the Latin ''crassus'', meaning "heavy" or "thick" and ''rostris'', meaning "-billed" (''rostrum'' = bill).〔 The "vegetarian" of its common name refers to its primary diet.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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