新疆天鹅的分布和保护

The Distribution and Protection of Swan in Xinjiang

新疆有三种天鹅,即大天鹅、小天鹅、疣鼻天鹅。大天鹅和疣鼻天鹅是夏侯鸟,小天鹅是迁栖期过客。春季,天鹅最多,估计有10000只,冬季不超过2000只。人类经济活动对天鹅数量影响极大,因而亟须进行保护。

There are three species of swan in Xinjiang, which are Cygnus cygnus, C. columbianus and C. olor. Cygnus cygnus and C. olor are the summer residents, C. columbianus is the passing bird. In spring swan's number would be at its height which reaches 10000 birds,but less than 2000 in winter. The human economic activities greatly affected on the swan's number. Therefore,the protection of swan demands prompt actions.