Fig. 1
From: Habitat structure is linked to the evolution of plumage colour in female, but not male, fairy-wrens
Association between habitat type (vegetation cover) and the contrast of the female (a) and male (b) head plumage against a brown background. Phylogenetic relationships are represented by branches and grey points represent ancestral states connecting black points (tips). Results remain qualitatively similar when the contrast is against a green background. Drawings of species made by Hilary Burn and used with permission from del Hoyo et al. (2014)