天鹅的种类很多,除了非洲、南极洲之外,在其他大陆都有分布。天鹅的体形较大,脖颈修长,除了黑天鹅和黑颈天鹅外,都是全身白色。小时候的天鹅,羽毛一般为灰褐色。童话《丑小鸭》的主角就是一只天鹅。天鹅是一种冬候鸟,喜欢群栖在湖泊和沼泽地带,主要以水生植物为食。每年三四月间,它们从南方飞向北方,产卵繁殖。每年五 There are many kinds of swans, except Africa and Antarctica, which are distributed in other continents. Swan’s larger body, slender neck, in addition to black swans and black-necked swans, are all body white. Swan as a child, the feathers are generally taupe. The fairy tale “ugly duckling” protagonist is a swan. Swan is a winter migratory birds, like to habitat in lakes and marshes, mainly for aquatic plants for food. In March and April each year, they fly north from the south and spawn. Five each year