This incubation adjustment of parents makes the synchrony in hatching and the hatching intervals of nestlings shorter than the laying intervals of eggs . this phenomenon was perhaps resulted from the incubating behavior difference of parents in laying time and incubating time . the research also found that the growth rate and survival rate in the latest hatched nestlings in little egret were lower than the earlier hatched ones 卵的孵化时间与产卵顺序呈负相关性，先产的卵比后产的卵所需孵化时间相对较长，此现象产生是由于亲鸟在产卵期和产卵后的孵化行为不一致造成的，这种孵化调节使同一窝雏鸟孵出时间具有相对集中的趋势，雏鸟出壳的时间间隔比产卵的时间间隔短；另一方面，在白鹭雏鸟的生长过程中，最晚出壳的雏鸟生长水平和成活率明显落后于早出壳的雏鸟，而池鹭由于窝卵数和窝雏数为5的数量相对较少，雏鸟生长均衡。
