Common merganser (English spelling) Mergus merganser; common merganser

Japanese: カワアイサ(英語表記)Mergus merganser; common merganser
Common merganser (English spelling) Mergus merganser; common merganser
It is a member of the Anatidae family and is larger than the common merganser, reaching a total length of 65cm. Males have a green-black head and neck, white and black wings, a black back, a grey waist and tail, and a white chest and abdomen. Females have a brown head and neck and a short crest (→ crest). The back is grey-brown, and the chest and abdomen are white. It is widely distributed from Europe to Central Asia, East Asia, and North America. In Japan, it migrates to lakes and rivers as a winter bird (→ migratory bird), and a small number breed in Hokkaido. The edge of the beak at the joint is serrated, which is characteristic of this species, making it easier to catch fish. (→ Anatidae)

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:
カモ目カモ科。ウミアイサよりも大きく,全長 65cm。雄は頭頸部が緑黒色,翼は白色と黒色,背は黒く腰と尾は灰色,胸腹部は白色。雌は頭頸部が褐色で短い冠羽(→羽冠)がある。背面は灰褐色,胸腹部は白色。ヨーロッパから中央アジア,東アジアにかけての地域と,北アメリカに広く分布する。日本には冬鳥(→渡り鳥)として湖沼や河川に渡来するほか,北海道で少数が繁殖している。嘴は合わせ目の縁がこの仲間の特徴である鋸歯状になっていて,魚をとりやすくなっている。(→ガンカモ類)

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