Data used in figures showing family-level or species-level averages.

Sheet 1 in S2 Data. Mean sexual selection scores for bird families partitioned by trophic level, as shown in Fig 5B. Sheet 2 in S2 Data. Mean sexual selection scores for bird families, partitioned by migratory behaviour, as shown in Fig 5C. Sheet 3 in S2 Data. Mean sexual selection scores for bird families, partitioned by territorial behaviour, as shown in Fig 5D. Sheet 4 in S2 Data. Mean sexual selection scores and temperature seasonality for avian families, as shown in Fig 5E. Sheet 5 in S2 Data. Extracted model predictions from species-level phylogenetic models predicting sexual selection score according to univariate life history traits. Values correspond to model predictions overlaying family averages in Fig 5B–5E. Sheet 6 in S2 Data. Mean sexual selection scores for each data certainty partition, as shown in S2a Fig Sheet 7 in S2 Data. Mean sexual selection scores for different ecological groups at each five-degree latitudinal bin, as shown in S7 Fig. (XLSX)