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common grackle
The common grackle (''Quiscalus quiscula'') is a large icterid which is found in large numbers through much of North America.
==Description==
Adult common grackles measure from in length, span across the wings and weigh .〔(【引用サイトリンク】 publisher=Cornell Lab of Ornithology )〕 Common grackles are less sexually dimorphic than larger grackle species but the differences between the sexes can still be noticeable. The male, which averages , is larger than the female, at an average of .〔(【引用サイトリンク】 title=Quiscalus quiscula, common grackle )〕 Adults have a long, dark bill, pale yellowish eyes and a long tail; its feathers appear black with purple, green or blue iridescence on the head, and primarily bronze sheen in the body plumage. The adult female, beyond being smaller, is usually less iridescent; her tail in particular is shorter, and unlike the males, does not keel (display a longitudinal ridge) in flight and is brown with no purple or blue gloss. The juvenile is brown with dark brown eyes.
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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