A research team at Newcastle University have made the world's smallest 3D glasses to try to better understand how the insects see.
The creatures are the only insects known to process images in three dimensions, like humans do. The praying mantis rely heavily on their sight, and can see up to 20 metres.
But as they have such simple nervous systems, scientists think they must have evolved 3D vision in a different way to humans.
The glasses could help scientists to work out how they can see in 3D.
The insects are put in front of computer generated images.
With the glasses it will seem like virtual flies are jumping out of the screen.
If the praying mantis pounces, it shows it's reacting to the images in the same way we do when watching a film in 3D.