英语翻译天鹅是雁形目鸭科雁亚科中最大的水禽,有7、8种.5种生活于北半球,均为白色,脚黑色.疣鼻天鹅有橙色的喙,喙基有黑

英语翻译
天鹅是雁形目鸭科雁亚科中最大的水禽,有7、8种.5种生活于北半球,均为白色,脚黑色.疣鼻天鹅有橙色的喙,喙基有黑色疣状突,颈弯曲,翅向上隆起；喇叭天鹅鸣声低沉,传得很远,喙全黑色；高声天鹅叫声喧闹,喙黑色,喙基黄色；比伊克氏天鹅与之相似,体型较小,比较安静；扬科夫斯基氏天鹅可能是比伊克氏天鹅的东方类型；哨天鹅发声如哨,喙黑色,眼周有小黄斑.
有些鸟类学家只将疣鼻天鹅归为天鹅属.喇叭天鹅体长1.7米,翅展达3米,是最大的天鹅,但体重较疣鼻天鹅轻.疣鼻天鹅天鹅体重可达23公斤,是最重的能飞的鸟类.南半球有黑天鹅和黑颈天鹅.天鹅体形优美,具有长颈,体坚实,脚大,在水中滑行时神态庄重,飞翔时长颈前伸,徐缓地扇动双翅.越冬迁飞时在高空组成斜线或“人”字形队列前进.其他水禽无论在水中或空中的行动均不如天鹅快速.
天鹅以头钻入（不是全身潜入）浅水中觅食水生植物.游泳或站立时,疣鼻天鹅和黑天鹅往往把一只脚放在背后.天鹅雌雄两性相似.它们能从气管发出不同的声音.除繁殖期外,天鹅成群地生活.雌雄结成终生配偶.求偶行为包括以喙相碰或以头相靠.由雌天鹅孵卵,雄天鹅在附近警戒；有的种类雄性亦替换孵卵.
幼雏颈短,绒毛稠密；出壳几小时后即能跑和游泳,但双亲仍精心照料数月；有的种类的幼雏可伏在父母亲的背上.未成年天鹅的羽毛为灰色或褐色,有杂纹,直至满两岁以上.第三年或第四年才达性成熟.自然界中,天鹅能活20年,人工豢养可活50年以上.因为天鹅身体很重,所以起飞时它们要在水面或地面向前冲跑一段距离.天鹅夫妇终生厮守,对后代也十分负责.为了保卫自己的巢、卵和幼雏,敢与狐狸等动物殊死搏斗.

Swan is Anseriformes Section wild ducks in the subfamily of the largest waterfowl,there are seven or eight species.5 living in the northern hemisphere,are white,black feet.Mute swans have orange beak,black-beaked verrucous sudden,neck curved wings upward uplift; swan song low horn,Chuan-long,all-black beak; loud noise call Swan,a black beak,beak - Yellow; than the Iraqi's Swan Similarly,the relatively small size,relatively quiet; Jankowski's Swan may be over Iraqi's swan type in the East; sentry posts,such as voice Swan,a black beak,eyes and small Macular Week .
Some ornithologists only Mute Swan classified as a swan.Swan horn length 1.7 meters,the exhibition wings up to 3 meters,is the largest swan,but more weight Mute Swan light.Mute Swan Swan weight of up to 23 kilograms,is the heaviest of the birds can fly.There are black swans in the southern hemisphere and the black swan neck.Swan beautiful shape,with a long-necked,solid body,big feet,gliding in the water when the air of solemn,long-necked reach when flying,slow to flap wings.Migration in the winter when the composition of the high-altitude or slash "who" shaped queue forward.Other waterfowl in the water or the air operations are not as fast Swan.
Swan to drill into the first (and not into the whole body) in shallow water feeding aquatic plants.Swimming or standing,Mute Swan and Black Swan are to be placed one foot behind.Swan similar to the male and female gender.They trachea from different voices.In addition to the breeding season,flocks of swans live.Male and female spouses for life to form.Courtship behavior,including beak to encounter or by the first phase.By the hatchery female swan,swan-hung in the vicinity of the warning; also replace some types of male hatchery.
Fledgling neck short,dense pile; hatched a few hours after the swim and run,but parents still care a few months; some kind of fledgling V may be in the back of their parents.Minor swan feathers for a gray or brown,miscellaneous pattern until more than two-year-old age.The third or fourth year only reached sexual maturity.The natural world,swans can live 20 years,kept artificially can live 50 years or more.Swan because of a heavy body,so when they take off or land in the water for some distance running downfield.Swan and his wife Sishou life,is also responsible for future generations.In order to defend their nests,eggs and fledgling,and dare to fight to the death of animals such as foxes.