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
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