Additional methods, figures, and table from Tropical bird species have less variable body sizes D. ReadQuentin BaiserBenjamin GradyJohn M. L. ZarnetskePhoebe RecordSydne BelmakerJonathan 2018 Detailed information on compilation of covariates and potential dataset artifacts, additional phylogenetic analysis, scatterplots of relationships with covariates, figure illustrating model selection, and table of regression coefficients