扎龙保护区春季白鹤迁徙观察

2003年3月20日至5月31日，在扎龙保护区设了3个观察点对迁徒停歇的白鹤进行了观察，观察结果为：2003年春季在扎龙保护区停歇的白鹤数量为464只，迁来的时间为4月3日，全部迁走的时间为5月29日，在扎龙湿地停歇57d；迁来时共有5个群体，后期由于干旱缺水，生态环境发生改变，致使5群群白鹤集中为3个群体；水是白鹤选择中途停歇地的重要生态因子，在没有水的情况下，白鹤会另寻休息地和觅食地，继续补充体能，而不是立即从扎龙湿地向北迁飞；白鹤以传统的停歇地作为主要停歇地点，没有明显的采食地与夜栖地之分。由于扎龙湿地进行了生态补水，生态环境得到了极大改善，近几年来在扎龙温地停歇的白鹤种群数量逐渐上升。

Observation on Siberian White Crane Migration in Spring in Zhalong Nature Reserve

From 20 March to 31 May in 2003, the migration behavior of the Siberian white cranes was observed at three observation spots established in Zhalong Nature Reserve. The observation results showed that the population of the Siberian white cranes resting at this place was 464, the time of their reaching was 3 April, the time of all population leaving was 29 May, and they rested for 57d in the Zhalong wetland. While reaching here, they were composed of 5 groups, afterward because of the environment changing and the lack of water and foods, the 5 groups concentrated into 3 groups, so we can conclude that under the circumstances of lacking foods, the Siberian white cranes will not migrate to north at once, but seek for other sites to get foods and rest. Since complementing water has been implemented in the Zhalong wetland and its environment has been improved tremendously, in recent years the population of the Siberian white crane resting in the Zhalong wetland has increased gradually.