Figure 3. Correlations between carotenoid and pteridine subcategories. (A) Correlation matrix showing HPD intervals of estimates from GLMMs. Size and color of upper diagonal circles indicate the strength and direction of the relationship. Central circles indicate the color of pigment subcategories. Significant correlations are in bold. There was no relationship between similarly hued carotenoids and pteridines: red ketocarotenoids and drosopterin (B), and yellow dietary carotenoids and xanthopterin (C). Broken lines indicate a non-significant trend between variables (N=186).