Fig. 1: Diverging specialists on the global body size spectrum.

The proportion of dietary specialists (points) is high in species with small and large body sizes, but low in species of intermediate size. Species were compared across 20 bins, each representing 5% quantiles of average adult body mass (see data divisions in Supplementary Fig. 1). The error bars represent the 95% binomial proportion confidence intervals. We considered proportions whose confidence intervals do not contain the proportion of specialists in all 3,487 mammal species (33.4%, indicated by the dashed grey line) as significant deviations from the null expectation (solid points). See the text for support from phylogenetic regression models.