...Because they feed on insects, all birds that breed in cold regions are migratory. However, one species of nightjar ( Phalaenoptilus nuttallii , English name common poorwill) is known to hibernate in rock crevices during the winter. During hibernation, their body temperature drops from the usual 40-41°C to 18-19°C. ... *Some of the terminology that mentions "Phalaenoptilus nuttallii" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…昆虫食のため,冬寒い地方で繁殖するものはみな渡り鳥である。しかし,ある種(Phalaenoptilus nuttallii,英名common poorwill)のヨタカは,冬の間岩の隙間で冬眠することが知られている。冬眠時の体温は,通常の40~41℃から18~19℃にまで下がっている。… ※「Phalaenoptilus nuttallii」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 |
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