Yes, butterflies have scales on the underside of their wings. These scales are small, hairlike structures that are arranged in overlapping rows. They are typically a lighter color than the rest of the wing and give the wings a delicate, powdery appearance. 

The scales are also responsible for the bright, iridescent colors that many butterfly species display. When light reflects off of the scales, it is absorbed and reflected at different wavelengths, producing the colorful effect that is characteristic of butterflies.

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