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. 2015 Dec 18;5:18514. doi: 10.1038/srep18514

Figure 2. Plumage colours of Australian landbirds by type of colour production mechanism plotted in two dimensional rasterised colour space (see Fig. 1 and text for explanation).

Figure 2

Melanins (A,B), carotenoids (C,D), psittacofulvins (E,F), structural colours (G,H), carotenoid + structure (I,J) and psittacofulvins + structure (K,L). Warmer colours represent locations in colour space with higher relative abundance for each colour-production mechanism and lines represent the edges of the tetrahedron in two dimensions.