A passerine bird of the Bunting family (illustration). Total length is about 17 cm. It is slightly larger than a white-throated sparrow. At first glance it appears whitish. Sexes are different; in the male's summer plumage, the back, wing tips and tail tip are black, and the head, lower back and belly are white. In the male's winter plumage, the head and back are brownish. The female resembles a male in winter. When flying, the bottom half of the wing stands out as white. It breeds in the tundra zone of the Arctic Circle, and migrates south to the mid-latitudes of the Northern Hemisphere in winter. It migrates to Japan as a winter bird and can be seen in northern Japan, but is not common outside of eastern Hokkaido. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
スズメ目ホオジロ科の鳥(イラスト)。全長約17cm。ホオジロより少し大きい。一見白っぽく見える。雌雄異色で,雄の夏羽は背,翼の先と尾の先は黒く,頭や腰,腹は白い。雄の冬羽は頭部や背が褐色をおびている。雌は冬鳥の雄に似ている。飛ぶときに翼の元半分あまりが白く目だつ。北極圏のツンドラ帯で繁殖し,冬は北半球の中緯度地方まで南下する。日本には冬鳥として渡来し,北日本に見られるが,北海道東部以外では多くない。
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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