Nightjar (Nighthawk) - Nightjar (English spelling)

Japanese: ヨタカ(夜鷹) - ヨタカ（英語表記）nightjar

A species of bird in the family Jungle Nightjar, or a general term for the family Jungle Nightjar. The Jungle Nightjar, Caprimulgus indicus (illustration), is about 29 cm long. Its entire body is black-brown with complex reddish-brown and yellowish-brown patterns, making it easy to confuse with fallen leaves and dead branches. There are white spots in the center of the throat, wings, and tail feathers, which are very noticeable when displaying. It is found in eastern and southern Asia east of India. It is a resident bird in the tropics, but those in temperate zones migrate south in winter.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

ヨタカ目ヨタカ科の鳥の1種，またはヨタカ科の総称。ヨタカCaprimulgus indicus(英名jungle nightjar)（イラスト）は全長約29cm。全身黒褐色で，赤褐色や黄褐色の複雑な模様があり，落葉や枯枝とまぎらわしい色をしている。のどの中央，翼，尾羽には白斑があり，これはディスプレーのときよく目だつ。インド以東のアジア東部･南部に分布する。熱帯では留鳥だが，温帯のものは冬季南へ渡る。

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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