Ecology: Butterfly wing patterns create confusion (Nature)
1 October 2026
Butterflies’ contrasting wing patterns may create visual illusions during flight that make it more difficult for predators to judge their speed and direction, according to research published in Nature. The findings suggest that wing patterns and flapping movements can work together as a form of defence against attacks.
High-contrast stripes and other markings have long been proposed to produce ‘motion dazzle’, a visual effect that could disrupt a predator’s view of moving prey. However, studies of this effect in animals such as zebras, snakes and lizards have not produced conclusive evidence to support this theory. Previous studies have often used targets without moving wings or limbs, overlooking how these movements might affect predators’ perception.
Jolyon Troscianko and colleagues combined high-speed filming, computer modelling, simulated evolution and a virtual butterfly-catching experiment to provide evidence that butterfly wing patterns and motion create powerful visual illusions. By comparing high-speed filming of real butterflies with computer simulations of unpatterned butterflies, the authors find that natural wing patterns created more misleading motion signals than digitally unpatterned wings. Simulations of 757 wing forms from 397 European species — including swallowtails, skippers and sooty coppers — indicated that contrasting vertical stripes, single bands and hindwing tails were among the features linked to stronger motion confusion. In 3,000 virtual butterfly-catching experiments, participants were presented videos of different butterflies that they had to “catch” by tapping a screen. Butterflies with patterns predicted to generate greater confusion caused participants’ attacks to be directed further behind them.
The results indicate that many butterfly patterns may have evolved partly to misdirect attacks during flight. The authors suggest that similar effects could occur in other moving animals with contrasting patterns, including on the flapping wings of birds and the flicking tails of lizards and fish. They note that future studies should include the undersides of butterfly wings and more flight movements, viewing angles, distances and backgrounds.
- Article
- Open access
- Published: 30 September 2026
Hancock, G.R.A., Briolat, E.S., Hughes, A.E. et al. Butterfly wing patterns in flight create powerful illusory motion cues. Nature (2026). https://doi.org/10.1038/s41586-026-11062-w
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https://www.nature.com/articles/d41586-026-03124-w
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