What butterfly wings have in common with barbershop poles

Butterfly wing patterns create a visual illusion similar to the barbershop pole effect, confusing predators by masking true speed and direction. A 2024 Nature paper shows these stripes and spots boost false motion cues, disrupting birds’ rapid targeting within tens of milliseconds. MIT captured the continuous structural growth of butterfly wings in 2021, revealing photonic crystal diffraction gratings that produce iridescent colors.

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