Fig. 1 Dendrogram of distributional units based on range types of birds in Anhui Province. Seven groups resulted from putting the subgroups together with Chi-square less than 0.899. IAa, Northern Huaihe River Plain and northwestern hilly region between Yangtze River and Huaihe River; IAb, Hilly region in Chuzhou; IB, Lakes in Yingshang and Huoqiu; IIAa, Dabie Mountains and mountainous region in southern Anhui; IIAb1, East edge of Dabie Mountains, northern mountainous region in southern Anhui, and Shijiu Lake in Dangtu; IIAb2, Northern hilly region in Dabie Mountains; IIB, Plains and wetlands along the Yangtze River.

Fig. 2 Bird faunistic groups based on breeding birds in Anhui Province. The seven groups of the geographical units have the same attributes as Fig.1. Map data are from Chinese Resources and Environment Database (Institute of Geographic Sciences and Natural Resources Research, CAS, 1998), which was digitized from Atlas of China (SinoMap Press, 1989), similarly hereinafter.

Fig. 3 Dendrogram of distributional units of bird species in Anhui Province. The seven groups resulted from putting the subgroups together with similarity coefficient less than 0.781. IA, Northern Huaihe River Plain; IB, Southern Huaihe River; IIAa, Dabie Mountains; IIAb11, Hilly region between Huaihe River and Yangtze River; IIAb12, Hilly region to the south of Yangtze River; IIAb2, Plains along the Yangtze River in Anqing; IIB, Mountainous region in southern Anhui.

Fig. 4 Distribution pattern based on the species composition of breeding birds in Anhui Province. The seven groups of the geographical units have the same attributes as Fig. 3

Fig. 5 The species richness pattern of breeding birds in Anhui Province. A, 177 species; B, 22 species in “ List of Wildlife Under Special State Protection” of China; C, 17 species listed in CITES appendices I and II.