What butterfly wings have in common with barbershop poles

Wing patterns, flight dynamics create "motion dazzle" effect, make it harder to gauge speed, direction. https://arstechnica.com/science/2026/09/what-butterfly-wings-have-in-common-with-barbershop-poles/?utm_brand=arstechnica&utm_social-type=owned&utm_source=mastodon&utm_medium=social