Species level sexual selection information for the world’s birds.

Sheet 1 in S1 Data. Metadata. Definitions and sources for all variables in subsequent data sheets. Sheet 2 in S1 Data. Sexual selection scores (BirdTree). Sexual selection scores and associated uncertainty estimates and source citations for 9,988 bird species included in the BirdTree data set [50], along with corresponding taxonomic, ecological, morphological, and distributional data, where available (n = 9,836 species). Sheet 3 in S1 Data. Sexual selection scores (eBird). Sexual selection scores aligned with an updated taxonomy [57] used in major online resources, including eBird and Birds of the World (n = 10,671 species). Sheet 4 in S1 Data. Sexual selection metrics. Measured residual testes mass, Bateman gradients (βSS), and Opportunity for Sexual Selection (IS) values used in sensitivity analysis. Sheet 5 in S1 Data. Taxonomic crosswalk. Guide to species matching for users transferring data between BirdTree and eBird taxonomies, which often differ in spelling and treatment of allospecies. Sheet 6 in S1 Data. Data sources. Full references for sources cited in Sheet 2. (XLSX)