thalassarche:Violet Starling (Cinnyricinclus leucogaster) with feather detail. Iridescence in bird
thalassarche: Violet Starling (Cinnyricinclus leucogaster) with feather detail. Iridescence in bird feathers is due to microstructures of the feather refracting light like a prism. Fossil evidence has shown that birds have had these structures in their feathers for at least 40 million years. -- source link