Steatornis caripensis; oilbird

Japanese: アブラヨタカ（英語表記）Steatornis caripensis; oilbird

Order: Nightjars, Family: Acanthariidae. Total length: 40-49cm. Overall color: reddish brown, with thin stripes on the tail and wings, and white spots on the head, chest, abdomen, and wings. Its legs are small and it can barely walk, only clinging to things. It is nocturnal, staying in caves during the day to build nests. At night, it flies out into the forest to pick oily fruits such as palms. It was named after the fact that it used to eat these fruits and catch plump chicks to extract oil from them. In the darkness of the cave, it makes a short, high-pitched call, and listens to the echoes to identify obstacles and determine the direction to fly. It is found from western Panama to northern South America and Trinidad and Tobago.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

ヨタカ目アブラヨタカ科。全長 40～49cm。全体に赤褐色で，尾羽と翼には細い筋模様が入り，頭部，胸腹部および翼には白斑がある。足は小さく，しがみつく程度でほとんど歩けない。夜行性で日中は洞窟内にとどまり，営巣する。夜になると森林へ出て飛びながらヤシなど油分の多い果実をとる。名前は，かつてこうした果実を食べてまるまると太った雛を捕え，油をとっていたことからつけられた。暗闇の洞窟内では短くかん高い声を出し，その反響音を聞いて障害物を認知し，飛ぶ方向判定をする。パナマ西部から南アメリカ北部，トリニダード・トバゴに分布する。

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