Bent-winged bat (English spelling)

Japanese: ユビナガコウモリ(指長蝙蝠) - ユビナガコウモリ（英語表記）bent‐winged bat

A mammal of the family Vespertilionidae in the order Chiroptera. This insectivorous bat is named after the remarkably long second phalange of the third digit (middle digit) of its forelimb. It is widely distributed in southern Europe, Asia, and Australia, and in Japan it is found on Honshu (except Hokkaido, the Izu Seven Islands), Shikoku, Kyushu, and their associated islands. Its forearm length is 47-48 mm, and its head and body length 60-67 mm. Its head is small, and its ears are short. Its wings are thin and narrow. When folding its wings, it bends the second phalange of the third digit forward. It has strong flying power, and flies at high altitudes at high speeds like a swift.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

翼手目ヒナコウモリ科の哺乳類。虫食性のコウモリで，前肢の第3指(中指)の第2指骨が著しく長いので，この名がある。ヨーロッパ南部，アジア，オーストラリアに広く分布し，日本では北海道，伊豆七島をのぞく本州，四国，九州およびその属島にいる。前腕長47～48mm，頭胴長60～67mm。頭が小さく，耳介も短い。いっぽう翼は細く，幅が狭い。翼をたたむとき，第3指の第2指骨を前方に折り曲げる。飛翔（ひしよう）力が強く，アマツバメのように高速で高空を飛ぶ。

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

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