树栖型苍鹭生态习性研究

Studies of ecology habits of Ardea Cinerea

1 998、1 999年 2月 -1 0月 ,在辽宁省朝阳县对苍鹭的生态习性进行观察研究 .该鸟在辽宁省为夏候鸟 ,每年最早 2月 2 6日迁来 ,最晚 9月 2 8日迁离 ,居留期 2 1 0天左右 .产卵始期为 3月 2 1日 ,隔日一枚 ,窝卵数 5枚 -7枚 .产出第 1枚卵后开始孵化 ,孵化期 2 4天 -2 6天 ,孵化率 92 .3 % .幼鸟为晚成鸟 ,育雏期 4 0天左右 .

From February to October in 1998 and that period in 1999, we investigated the ecology habits of Ardea cinerea in Chaoyang county, Liaoning Province. The birds are summer residents in Liaoning Province, they remain on the breeding grounds for 210 days. The earliest egg-laying was dated on March 21, and egg was laid every other day, incubation period lasted for 24-26 days. The incubation rate was 92.3%, the parental care period about 40 days.