A Morpho butterfly looks like this. Emanuela Carratoni/iStock/Thinkstock
Structural color in Junonia butterflies evolves by tuning scale lamina thickness
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PDF) Variable multilayer reflection together with long-pass filtering pigment determines the wing coloration of papilionid butterflies of the nireus group
Butterflies NISE Network
Striking green-eyed butterfly discovered in the United States
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Butterfly-inspired nanotech makes natural-looking pictures on digital screens
Scientific Image - Nanoscale Structures on a Blue Morpho Butterfly Wing
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Butterfly wing color made of pigmented liquid - ScienceDirect
Genetic Basis of Melanin Pigmentation in Butterfly Wings