Fig. 4: Relationships between migratory strategies and life history traits.

Migratory strategy and a PC1 scores (fast–slow continuum) and b PC2 scores (reproductive strategy) for flying species (n = 777 species). Boxplots represent the median and the interquartile range (IQR) and the whiskers the 1.5*IQR. FM stands for fully migratory species, PM for partially migratory species and NM for non-migratory species.