Figure 5 in Eigensurface analysis, ecology, and modelling of morphological adaptation in the falconiform humerus (Falconiformes: Aves)

Figure 5. Ordination of the 50 falconiform humerus surfaces in the space formed by the first three eigensurface axes. When taken together this three-dimensional space accounts for 62.4% of observed surface shape variation. Species abbreviations are given in Appendix 1. Note the strong clustering of taxa into non-phylogenetic groups in the subspace, circled in the figure. The locations of these same specimens in the space formed by the first 21 eigensurface (E-Surf) axes (accounting for 95.4% of observed surface shape variation) were used as a summary of biologically important shape variation for all subsequent analyses. See text for discussion.