The Whooper Swans (Cygnus cygnus) arrived at nesting grounds of Bayinbuluke in Xinjiang from late March to middle April and the nesting period was generally from April to June in 1992. Most nests are often (?)

• 大天鹅(Cygnus cygnus)每年3月底至4月中旬迁来新疆巴音布鲁克。