求一篇關(guān)于天鵝的英文介紹

Swans are birds of the family Anatidae, which also includes geese and ducks. Swans are grouped with the closely related geese in the subfamily Anserinae where they form the tribe Cygnini. Sometimes, they are considered a distinct subfamily, Cygninae. Swans usually mate for life, though 'divorce' does sometimes occur, particularly following nesting failure. The number of eggs in each clutch ranges from three to eight.

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Swans are birds of the family Anatidae, which also includes geese and ducks. Swans are grouped with the closely related geese in the subfamily Anserinae where they form the tribe Cygnini. Sometimes, they are considered a distinct subfamily, Cygninae. Swans usually mate for life, though 'divorce' does sometimes occur, particularly following nesting failure. The number of eggs in each clutch ranges from three to eight.

天鵝屬在生物分類學(xué)上是雁形目（也包括鵝和鴨科）中的鴨科中的一個(gè)屬。這一屬的鳥(niǎo)類是游禽中體形最大的種類，被俗稱為“天鵝”。有時(shí)它們被當(dāng)作一個(gè)比較獨(dú)特的分支來(lái)研究。天鵝一般一生中都是配偶而居，有時(shí)候如果沒(méi)有找到自己的巢穴，它們也會(huì)|離婚|另尋配偶。一般一次一窩能生3到8個(gè)蛋。