Fig. 2From: The multifactorial nature of beak and skull shape evolution in parrots and cockatoos (Psittaciformes)Phylomorphospaces of the residual shapes from the pgls regression of shape and centroid size. Points coloured by clade (a, b) and diet (c, d). R_PC1 vs R_PC2 (a, c) and R_PC2 vs R_PC3 (b, d). Inset skulls characterise the shapes represented by the maximum and minimum end warps of their corresponding R_PC axesBack to article page