The feather’s colours are produced by microscopic structures, by pigments that can reflect, refract, or scatter the selected light wavelengths, or by a combination of both.Most of the feather pigments are carotenoids (red, yellow, orange) and melanins (beige and brown pheomelanin, grey and black eumelanin); the other pigments takes place only in certain taxa – the yellow to red psittacofulvine (that are found in some parrots) and the green turacoverdin and red turacin (porphyrin pigments found only in turacos).