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How Butterflies Use Optical Illusions to Elude and Escape Predators
Researchers say wing stripes shift during flight, creating a barbershop-pole illusion that may help butterflies evade predators.
- University of Exeter researchers found butterfly wing patterns create "motion dazzle," optical illusions making insects appear to move differently than their actual flight path. Jolyon Troscianko led the study published in Nature.
- Stripes on butterfly forewings combine with wingbeats to create optical illusions. Troscianko noted the "barber pole illusion" causes stripes to appear moving vertically rather than sideways, confusing predator motion perception.
- Researchers recruited 100 human participants for 3,000 virtual butterfly-catching experiments. Next, the team simulated nearly 400 European butterfly species and over 50,000 wing patterns to confirm motion dazzle effects were widespread.
- When a bird lunges at a butterfly in flight, the illusion makes it harder to judge speed and direction. Troscianko suggests this "confusion" effect is pivotal to butterfly survival as a group.
- Future research will improve simulations to account for ventral wing patterning and flight dynamics. The Nature study opens new avenues to learn about motion vision across species from birds to fish.
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43 Articles
43 Articles
·Amsterdam, Netherlands (Kingdom of the)
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Butterfly wing patterns may trick predators with motion illusions
·London, United Kingdom
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Butterflies are nice to look at, but they are completely defenseless against predators. So why do they draw attention to themselves with contrasting, colorful coloring? Researchers now provide an answer. The effect could also work with zebras, snakes and fish.
(Seoul = Yonhap News) Reporter Lee Joo-young = The colorful wings of a butterfly, combined with their flapping motion during flight, cause predators to misjudge the direction and speed of movement...
·Seoul, Korea (the Republic of)
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Total News Sources43
Leaning Left7Leaning Right8Center21Last UpdatedBias Distribution58% Center
Bias Distribution
- 58% of the sources are Center
58% Center
L 20%
C 58%
R 22%
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