FIG. 2 in Ant Morphology Mediates Diet Preference in a Neotropical Toad (Rhinella alata)

FIG. 2. Principal component analysis of seven ant traits. Ant species were plotted in the PCA and colored by preference categories (preferred [blue], neutral [black], and avoided [red]). The inset depicts the correlations between principal components and each ant trait. ''trait.L'' (linear) and ''trait.Q'' (quadratic) are representations of ordinal variables. The linear representation indicates the direction in PC space of increasing trait values, while the quadratic representation indicates the direction in PC space of moderate trait values.