Correlation among species-level indicator vectors.

<p>A false color map depicting correlations among indicator vectors for 122 species of North American birds is shown in (A) where order is alphabetical by species name. Blocks of high correlation on the diagonal reflected affinity among species within genera. The large squares of highly-correlated birds in the upper left hand corner indicated close affinities among species in several genera of ducks and geese (<i>Aix, Anas, Athya, Branta, Bucephala</i>). In (B) the ordering follows established taxonomy, reflecting phylogenetic relationships <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0007051#pone.0007051-1" target="_blank">[13]</a>.