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African grey parrot
The African grey parrot, grey parrot or Congo African grey parrot (''Psittacus erithacus'') is an Old World parrot in the family Psittacidae.
==Description==
The African grey parrot is a medium-sized, predominantly grey, black-billed parrot which weighs 400 g, with a length of 33 cm〔 and an average wingspan of 46–52 cm.〔 The tail and undertail coverts are red, in comparison to the maroon of the smaller Timneh parrot. Both sexes appear similar.〔(【引用サイトリンク】url=http://www.parrots.org/index.php/encyclopedia/profile/grey_parrot/ )〕
The colouration of juveniles is similar to that of adults, however the eye is typically dark grey to black, in comparison to the greyish-yellow eyes of the adult birds. The undertail coverts are also tinged with grey.〔
African grey parrots are long-lived birds that may live for 40-60 years in captivity, although their mean lifespan in the wild appears to be somewhat shorter at ~23 years.〔
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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