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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Bicyclus anynana ： ウィキペディア英語版 Bicyclus anynana The squinting bush brown (''Bicyclus anynana'') is a small brown butterfly in the family Nymphalidae, the most globally diverse family of butterflies. It is primarily found in eastern Africa from southern Sudan to Swaziland.〔(''Bicyclus'' ), Site of Markku Savela〕 It is found mostly in woodland areas and flies close to the ground.〔 Male wingspans are 35–40 mm and female wingspans are 45–49 mm.〔 The bush brown is helpful for research because of its ideal size and breeding time. In addition to this, the bush brown is one of the only insects to vary its coloration depending on the season,〔 making it a valuable tool in studying phenotypic plasticity. Wet seasons produce butterflies with large eyespots, while dry seasons have butterflies dull in color.〔 Male butterflies engage in mud-puddling, which involves taking up nutrients by aggregating on wet soil and dung.〔 Males use pheromones to attract females during courtship.〔 However, courtship in the bush brown is notable for its plasticity: temperature during adult development plays a large role in determining the rate of male courtship as well as the roles of males and females during the courtship process.〔〔 The bush brown uses its eyespots as a defense against avian predators.〔 In addition, females choose male mates based on their eyespots; in a process known as stabilizing selection, eyespots that are too large or too small are selected against.〔 ==Description== The bush brown is a small brown butterfly with a wingspan of 35–40 mm for males and 45-49 for females. Males have sexual traits on their wings called androconia that release pheromones during courtship.〔 The butterflies is characterized by their unusually short front legs and their rather non-descript brown wings. Bush browns, however, are known for having several large eyespots in the wet season. There are two extended generations per year. The wet season form is on wing in spring and summer and the dry season form in autumn and winter〔Woodhall, S. Field Guide to Butterflies of South Africa, Cape Town:Struik Publishers, 2005.〕 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「Bicyclus anynana」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.