Additional file 2: Table S1. of Intraspecific eye color variability in birds and mammals: a recent evolutionary event exclusive to humans and domestic animals

Survey (non-exhaustive due to paucity of published information) of eye color changes in wild bird species. The species with demonstrated changes in eye coloration are less than 1% of all extant bird species, and in most instances, changes occur when young birds become adults (see, e.g., Nogueira DM, Alves MAS. Iris colour as an indicator of age feature in female Brazilian tanagers (Passeriformes: Emberizidae) confirmed by molecular sexing technique. Int. J. Trop. Biol. 2008; 56(4): 629–1633). (XLSX 23 kb)