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Great-tailed grackle
The great-tailed grackle or Mexican grackle (''Quiscalus mexicanus'') is a medium-sized, gregarious passerine bird native to North and South America. A member of the family Icteridae, it is one of ten extant species of grackle and is closely related to the boat-tailed grackle and the slender-billed grackle.〔(Powell, A.F.L.A., F.K. Barker and S.M. Lanyon. 2008. A complete species-level phylogeny of the grackles (Quiscalus spp.), including the extinct Slender-billed Grackle, inferred from mitochondrial DNA. ''Condor'' 110:718-728. )〕 It is sometimes erroneously referred to as a "blackbird" in the southern United States,〔(【引用サイトリンク】title=Eight Reasons Grackles are Awesome )
*〕 although blackbirds belong to the genus ''Euphagus''. Similarly, it is often called "cuervo" in areas of Mexico owing to its glossy black plumage, although it is not a member of the genus ''Corvus'', nor even of the family Corvidae.
==Description==
Great-tailed grackles are medium-sized birds (larger than starlings and smaller than crows; -) with males weighing - and females between -, and both sexes have long tails.〔 Males are iridescent black with a purple-blue sheen on the feathers of the head and upper body, while females are brown with darker wings and tail.〔 The morphological difference between males and females of a species is known as sexual dimorphism.〔 Adults of both sexes have bright yellow eyes, while juveniles of both sexes have brown eyes and brown plumage like females (except for streaks on the breast).〔 Great-tailed grackles, particularly the adult males, have a keel-shaped tail that they can fold vertically by aligning the two halves.〔
The great-tailed grackle and boat-tailed grackle were considered the same species until genetic analyses distinguished them as two separate species.
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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