Variation among bird families in the Nanling region
Comparisons of bird occurrence in the 3 Nanling regions—North Nanling, South Nanling, and the Nanling Mountains—indicated multiple differences in the species composition of families and the occurrence of individuals within families. Chi-square testing showed a significant difference in the occurrence numbers of birds in each family among the three subregions (Supporting information). One-tailed Wilcoxon’s tests among families based on the occurrence numbers of bird species showed a high probability (P < 0.3) of a difference in numbers among the 3 subregions in multiple families (Supporting information). In the one-tailed tests, more species from Leiothrichidae, Laridae, Strigidae, Scolopacidae and Muscicapidae occur in South Nanling than North Nanling. Compared to North Nanling, the Nanling Mountains contain more individuals in Leiothrichidae, Phylloscopidae and Leiothrichidae. Compared to South Nanling, the Nanling Mountains hold more individuals in the Phasianidae family. Individuals in the Turididae, Sturnidae and Columbidae are more numerous in South Nanling than Nanling itself, while individuals in the Anatidae, Laridae, and Scolopacidae are more numerous North Nanling than in Nanling itself. All two-tailed test results with high probability (P < 0.3) are included in one-tailed test results (Supporting information).