Red-billed quelea (red-leaf bird)

Japanese: コウヨウチョウ(紅葉鳥) - コウヨウチョウ（英語表記）red‐billed quelea

A passerine bird of the Weaverbird family. It is about 11 cm long, slightly smaller than a sparrow. Sexes are heterochromatic. The male's reproductive plumage is orange-yellow from the crown to the back of the neck, the face and throat are black, and the back is brown with black stripes. The beak is red. The male's non-reproductive plumage and the female's face and throat are not black, but the head is gray and the eyebrows and throat are whitish. It is distributed in sub-Saharan Africa, living in the savanna. It feeds on seeds and grains, appearing in large flocks during the ripening season and causing great damage to crops. Sometimes flocks of up to one million birds will attack fields.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

スズメ目ハタオリドリ科の鳥。全長約11cm，スズメよりひと回り小さい。雌雄異色。雄の生殖羽は頭頂から後頸（こうけい）までオレンジ色がかった黄色で，顔，のどが黒く，背面は褐色に黒い縞がある。くちばしは赤い。雄の非生殖羽と雌は顔とのどが黒くなく，頭部は灰色で眉とのどは白っぽい。サハラ砂漠以南のアフリカに分布し，サバンナにすむ。種子と穀物を食べ，実りの時期に大群で現れ，農作物に大害を与える。ときには100万羽もの大群が畑を襲う。

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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