本文作者于1982～1991年,在庞泉沟国家级自然保护区对我国二级重点保护动物(周鸟)鸮(Bubo bubo ussuriensis)的种群密度及繁殖进行了调查研究。证实了该鸟栖于山地疏林间,两小时四公里遇见数为0.458只。3～6月份繁殖,每窝卵数2～3枚,4月上旬开始产卵,每隔2～3天产卵一枚,孵卵期38.5天左右,孵化率为90.91%。食物以动物性为主,兽类、家畜尸体、鸟类和爬行动物分别各占55.473%、74.65%、35.523%和1.673%。 The authors studied the population density and reproduction of Bubo bubo ussuriensis, a second-grade protected animal in China, from 1982 to 1991 in Pangquangou National Nature Reserve. Confirmed that the bird habitat in the mountain forest, two-hour four kilometers met a number of 0.458 only. 3 ~ June breeding, eggs per litter 2 to 3, beginning in early April spawning, every 2 to 3 days spawning a hatching period of 38.5 days, the hatching rate was 90.91%. The food was mainly animal, with 55.473%, 74.65%, 35.523% and 1.673% of mammals, livestock, birds and reptiles respectively.