Black-headed gull (Yuri-gull)

Japanese: ユリカモメ(百合鷗) - ユリカモメ（英語表記）black‐headed gull

A bird of the family Laridae (illustration) in the order Charadriiformes. A seagull found widely distributed in the mid-latitudes of the Eurasian continent. They breed in large groups on the coasts, along the banks of inland lakes and marshes, on river bars, and on islands. They migrate to Japan as winter birds and live in flocks on the coasts of bays, ports, and river mouths in the Kanto region and west, but are often seen on inland lakes and the upper reaches of large rivers. They often come onto land on windy days or when the sea is rough. Total length is about 40 cm. The back and upper surfaces of the wings are pale blue-gray, the undersides are white, and there are black areas at the tips of the wings.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

チドリ目カモメ科の鳥（イラスト）。ユーラシア大陸の中緯度地方に広く分布するカモメ。海岸地方や内陸の湖沼畔，川の中州，島などの湿地に，かなりの群れをつくって集団で繁殖する。日本には冬鳥として渡来し，おもに関東地方以西の湾，港，河口など海岸に群れで生息しているが，内陸の湖沼や大きな川の上流で見かけることも少なくない。風が強い日や海上が荒れている日には陸地によく入ってくる。全長約40cm。背と翼の上面は淡い青灰色で，下面は白色，翼の先端に黒色部がある。

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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