苍鹭的繁殖生物学观察研究

Study on the breeding ecology of Ardea cinerea

1988年3—8月在陕西省勉县铜钱坝乡陈家湾村对苍鹭的繁殖生态进行了观察。结果表明;苍鹭营巢期3～7天,交尾后5～7天产第一枚卵,窝卵数4.27±1.44(n=15)枚,孵化期25～27天,卵的重量损失率为16.6±4.4%(n=23)。雏留巢期约40天,育雏期60天。营巢、孵化、育雏均由双亲共同承担。

Observations on the Grey Heron Ardea cinerea were at Cheng Jiawan, Tong Qianba,MianXian,Shaanxi province during March to August,1988. The bird nest on tall trees in flocks.Both male and female herons share in the stick-collecting,incubating and nestling feeding,The egg-laying begin after 3 7 days of nest building.The clutch sizf is 4.27±1.44(n=15)eggs which colour is blue-green without any spots,and mostly oval in shape. The incubation period lasts about 25-27 days.Owing to the water loss,the egg weight reduced by 16.6±4.4%(n=23)during this period.The nestlings stay in nests about 40 days,and fledged at about 60 days.