Additional file 4: of Gene loss, adaptive evolution and the co-evolution of plumage coloration genes with opsins in birds

Phylogenetic reconstruction of the RH1 217 residue in birds. The species tree was used as described by Jarvis et al. (2014) [17]. Red and blue species represent land and water birds respectively. Colored ancestral lineages are suggestive of the M (Met; red), L (Leu; blue) and A (Ala; violet) residues in the 217 site of the RH1 opsin. (PDF 19 kb