The structure of breeding bird communities under the influence of artificial nest boxes in the secondary forest in Zuojia Nature Protective Area of Jilin Province was investigated preliminary during the period of March to July, 2004.
2004 年 3～7 月,笔者在吉林省左家自然保护区对人工巢箱条件下天然次生林中的繁殖鸟类群落结构进行了初步研究。
参考来源 - 人工巢箱作用下天然次生林繁殖鸟类的群落结构初步研究·2,447,543篇论文数据，部分数据来源于NoteExpress
In the south, almost every month visible breeding bird sparrows.
在南方，几乎每月都可见麻雀繁殖雏鸟。
This paper summarize the effects of breeding bird and hatching egg and hatching condition on hatchability.
本文综述了种禽、种蛋和孵化条件对孵化率的影响。
Lack, however, suggested that clutch size—the number of eggs a bird lays per breeding cycle—is far below the potential limit of egg production.
然而，缺乏情况表明卵的大小——每一个繁殖周期下的蛋的数量——远低于产蛋的潜在限制。
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