Young Brunette Girl With A Blue Feather

• Coloration
Left: turacin (red) and turacoverdin (green, with some structural blue iridescence at lower end) on the wing of Tauraco bannermani
Right: carotenoids (red) and melanins (dark) on belly/wings of Ramphocelus bresilius
The colors of feathers are produced by the presence of pigments, or by microscopic refractive structures, or by a combination of both.