Global patterns fo population density in birds

Training dataset and Population density predictions for 9089 species (Appendix S2) Reference: Santini L., Tobias J., Callaghan C., Gallego-Zamorano J., Benítez López A. 2023. Global patterns and predictors of avian population density. Global Ecology and Biogeography本数据集涵盖9089个物种的训练数据集（Training dataset）与种群密度预测结果（Population density predictions），详见附录S2。参考文献：Santini L.、Tobias J.、Callaghan C.、Gallego-Zamorano J.、Benítez López A. 2023年，《鸟类种群密度的全球格局与影响因子（Global patterns and predictors of avian population density）》，刊载于《全球生态学与生物地理学（Global Ecology and Biogeography）》。