Body measurements Principal component Principal component
PC1 PC2
Tarsus length (mm) 0.73* 0.28
Tail length (mm) 0.77* 0.13
Wing chord length (mm) 0.75* -0.15
Exposed culmen length (mm) 0.02 0.83*
Beak width (mm) 0.38 -0.75*
Beak depth (mm) 0.65* 0.11