Polyura

...An insect of the Nymphalidae family of the Lepidoptera order. It is found in areas from northern India to the Malay Peninsula and western China, and in Japan, it is endemic to the central and northern parts of Okinawa Island. It is a rather large butterfly with a span of 7-8cm. Its Japanese name comes from the two tail-like protrusions on its hind wings. Its wings have black markings on a pale yellow background, and the undersides have a beautiful silvery-white luster. Females are slightly larger than males, and have rounded wings. Overwintering pupae emerge from the end of March to April, and emerge three times a year, from June to July and from September to October, but sometimes emerge twice a year. ...

*Some of the terminology explanations that mention "Polyura" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…鱗翅目タテハチョウ科の昆虫。インド北部からマレー半島，中国西部などに分布し，日本では沖縄本島中部以北の特産。やや大型のチョウで開張は7～8cm。和名は後翅に2本の尾状突起があることによる。翅は淡黄色の地に黒い斑紋があり，裏面には銀白色の光沢があって美しい。雌は雄よりやや大型，翅が丸みを帯びる。3月末から4月にかけて越冬さなぎが羽化し，さらに6～7月，9～10月と年3回発生するが，年2回の場合もある。…

※「Polyura」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報