（図１）冬（上）および夏（下）の気温とくちばし&#12398 (IMAGE)

Okinawa Institute of Science and Technology (OIST) Graduate University

（図１）冬（上）および夏（下）の気温とくちばし&#12398

Caption

（上のグラフ）くちばしの大きさと冬の最低気温の関係。冬が寒い場所ではくちばしが小さい傾向がみられる。（下のグラフ）夏の最高気温とくちばしの大きさとの明らかな相関はみられない。

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Okinawa Institute of Science and Technology Graduate University (OIST)

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