栗鸮繁殖习性的观察

A Preliminary Observation of Breeding Habits of Oriental Bay Owl

20 0 2年 3月至 7月 ,在海南大田国家级自然保护区对一对栗的繁殖习性进行了观察。结果表明 :这对栗最早在 3月 2 3日产卵 ,窝卵数 4枚 ,卵的受精率为 75 0 0 % ,4月末至 5月初出壳 ,孵卵期 36～ 4 2d ,受精卵的孵化率及雏鸟的成活率均为 10 0 0 0 % ,雏鸟生长迅速。孵卵和育雏由雌雄鸟共同完成 ,亲鸟护卵性极强 ,随着雏鸟的长大 ,亲鸟暖雏和护雏的时间逐渐减少。栗的食物主要是啮齿类、蜥蜴类和蛙类 ,还包括一些鸟类和昆虫。

Breeding habits of a pair of oriental bay owls (Phodilus badius) were preliminarily observed from March to July in 2002 at Hainan Datian National Nature Reserve. At first, a total of 4 eggs were laid in nest on March 23rd, among which 3 eggs became zygotes. Chicks were hatched between the end of April and the begaining of May. Incubation lasted for 36～42 days. Incubation rate of zygotes and survival rate of chicks were all 100.00%. In the following periods chicks developed rapidly. A clutch was incubated and fed by both female and male owls. The parents showed strong protection for their eggs and nestlings and spent less time in warming and feeding the chicks with the age of the nestlings. The food components of chicks were rodents, lizards and frogs. The nestlings also ate few birds and insects.