Fig. 6
From: Evolution of female promiscuity in Passerides songbirds
Relationship between migratory behaviour and female promiscuity. a Boxplot showing female promiscuity estimates for residents, partial migrants and full migrants. The pink boxes indicate the first and third quartiles where the internal line is the median; bars are 1.5 interquartile ranges with outliers indicated. Numbers are sample sizes. b Scatterplot showing female promiscuity as a function of migration distance. A polynomial regression line with 95% confidence interval is indicated for illustration