For years, I’ve been told that bird feathers have no colour, but do prismatic effects with light. I’ve even seen a fascinating display at a museum which had three different feathers and, with a switch, you can move between top and back lighting. When back-lit, they become monochromatic, which pretty much convinced me.
Then, in researching what to say about this guy, I learn that turacos have both green and red pigments in their feathers.
Of course, this bird is neither green or red, and I’m red-green colourblind … so I can only conclude that the universe is messing with me.