feb 11, 2021
Here’s a good write-up: Natural wonder: Wing ‘clap’ solves mystery of butterfly flight
“That the wings are cupped when butterflies clap them together, makes the wing stroke much more effective. It is an elegant mechanism that is far more advanced than we imagined, and it is fascinating. The butterflies benefit from the technique when they have to take off quickly to escape from predators,” says biology researcher Per Henningsson, who studied the butterflies’ aerodynamics together with colleague Christoffer Johansson.
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