基于取食行为探究北京居民区鸟类的食源特征及多样性

殷鲁秦, 王成, 韩文静

Food source characteristics and diversity of birds based on feeding behavior in residential areas of Beijing

Luqin Yin, Cheng Wang, Wenjing Han

图4 不同季节不同类型食物的取食频次

Fig. 4 Feeding frequency of different food types in different seasons