From the Guardian · · 1m 10s
Butterflies trick predators with wing illusions
Butterflies use wing motion to confuse predators, study finds.
In brief
Butterflies use wing motion to confuse predators, study finds. Butterfly wing patterns create motion illusions that distract birds from attacking them. Originally reported by the Guardian.
Butterflies evade birds with visual tricks
British ecologists found butterflies use wing motion to confuse predators by scrambling their speed and direction.
Wing patterns create motion confusion
Swallowtail butterflies deploy shifting stripes that change angle and point as they fly, creating misleading motion.
Illusions disrupt predator attacks
The illusions interfere with predators' visual targeting systems, causing birds to miss or strike less vulnerable wing areas.
Butterfly wing illusions compared to barber pole
Researchers compared the effect to the barber pole illusion where stripes appear to move upward even though the pole spins in place.
Swallowtails excel at motion confusion
Swallowtail butterflies have tails that increase motion confusion and show signs of bird attacks with missing tails and beak-shaped holes.
Human volunteers test motion illusions
100 human volunteers acting as predators struggled to catch virtual butterflies on a touchscreen.
Study published in Nature journal
The study on butterfly wing patterns creating motion illusions was published in the journal Nature.
The big picture
Butterfly wing patterns create motion illusions that distract birds from attacking them.
