FRANK FOX / SCIENCE PHOTO LIBRARY FRANK FOX / SCIENCE PHOTO LIBRARY
Butterfly wing scales. Macro photograph of scales on the wing of a Menelaus blue morpho (Morpho menelaus) butterfly. The colour of a butterfly's wing can arise either from a pigment contained in the scales or from the actual structure of the scales themselves. Magnification: x286, when printed 10 centimetres wide.
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