Praying Mantises and 3-D Glasses

Researchers at the Newcastle University have recently outfitted praying mantises with 3-D glasses.

Though it may seem like some sort of pop-art fashion statement, the glasses are actually part of an experiment studying how 3-D vision evolved.

Newcastle University research into 3D vision in praying mantises by Dr. Vivek Nityananda. Pic: Mike Urwin. 151015

Newcastle University

The praying mantis was selected because it is primarily a visual hunter, sitting and waiting to attack prey. In fact, praying mantises are the only insect that can turn their head without moving their body—a trait that allows them to be near motionless while waiting.

Many even have camouflage to look like flowers or leaves, but this isn’t for defense; it’s so they can more easily ambush their food.

Newcastle University research into 3D vision in praying mantises by Dr. Vivek Nityananda. Pic: Mike Urwin. 151015

Newcastle University

The Experiment

Scientists were able to design an insect cinema and attach 3-D lenses to the mantises’ eyes with beeswax in something that looks disturbingly close to something out of A Clockwork Orange.

Researchers found the mantises wouldn’t react to 2-D projections of insects, but when a 3-D insect was projected—they attacked!

The researchers hope to apply their findings to 3-D vision in robots.

Newcastle University research into 3D vision in praying mantises by Dr. Vivek Nityananda. Pic: Mike Urwin. 151015

Newcastle University

Some Other Mantis Weirdness

The praying mantis is the only known animal to have a single ear—it’s located on its chest. This ear can detect the sonar signals of bats—allowing mantises to evade capture.

In Japan, it was once commonplace to attach a praying mantis to their bed to protect the sleeper from mosquitoes.


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