Data files and R codes from: Ecological predictors of interspecific variation in bird bill and leg lengths on a global scale

This repository contains data files and R codes for Xu et al. Ecological predictors of interspecific variation in bird bill and leg lengths on a global scale. It has two folders. One is dedicated to visualize phylogenetic distribution of relative bill length and tarsus length. The other is for performing phylogenetic linear regressions and phylogenetic path analyses. The latter contains two subfolders, one corresponding to the classification of migration by BirdLife International, and the other based on the classification of migration by Tobias et al. 2022.