Monarch butterfly - o-kabamadara (English spelling) monarch

Japanese: オオカバマダラ - おおかばまだら(英語表記)monarch
Monarch butterfly - o-kabamadara (English spelling) monarch

A butterfly belonging to the order Lepidoptera and the family Danaidae. Originally native to North and South America, it is also found in the Pacific islands and tropical Asia, where it is said to have spread secondary to the cultivation of milkweed. It is a highly migratory species, and there are known to have been cases where it formed swarms and migrated from the Americas to Europe via the Atlantic Ocean. In Japan, two cases were discovered in the Tokyo metropolitan area in 1950, and an outbreak was reported on Amami Oshima in 1983, but these were either vagrants or temporary outbreaks caused by vagrants. In the United States, it is distributed up to southern Canada in summer, but in winter it migrates to the southern United States, including California and Florida, or Mexico, where it hibernates in groups. The food plant for the larvae is milkweed, a plant of the Asclepiadaceae family.

[Takashi Shiramizu]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

昆虫綱鱗翅(りんし)目マダラチョウ科に属するチョウ。もともと南・北アメリカ原産の種であるが、太平洋の諸島や東洋熱帯にも分布し、これらの地域にはトウワタの栽培とともに二次的に広がったものといわれている。移動性の強い種で、群れをつくってアメリカ大陸から大西洋を経てヨーロッパに渡った例も知られている。日本では1950年(昭和25)に東京都下で2例の発見例があるほか、58年には奄美(あまみ)大島で発生がみられたが、これらは迷チョウまたは迷チョウに基づく一時的な発生である。アメリカでは夏季はカナダ南部まで分布するが、冬季は合衆国南部のカリフォルニア州、フロリダ州、あるいはメキシコまで移動し、集団をつくって越冬する。幼虫の食草はガガイモ科植物のトウワタである。

[白水 隆]

出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例

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