Fig. 1
From: Polygyny is linked to accelerated birdsong evolution but not to larger song repertoires
Differences in song characteristics for different rates of polygyny and extra-pair paternity. Each plot shows the distribution of song characteristics for species in our database. The top row (green) compares monogamous and polygynous species, with polygyny defined as >5% of males taking multiple mates when quantitative data is available, and the bottom row (orange) compares species with low and high rates of EPP, with a high rate of EPP defined as >10% of offspring in a population being the product of extra-pair fertilization (see Methods for full classification criteria). Box plots indicate the median (black bar) interquartile range (IQR, box) and Q1 − 1.5*IQR, Q3 + 1.5*IQR (whiskers) of each distribution, and scatter plots of the data are shown to the right of each box plot. We compared each pair of distributions phylogenetic ANOVA (phylANOVA) tests, which control for shared ancestry. p-values for these tests are shown above each box plot, with statistically significant results shown in red
