Anonim

And yet it moves
An amazing trick to avoid being discovered. From the tiny brain of a dragonfly.

The flight of dragonflies is a miracle of precision and speed. But how do they do it?
The flight of dragonflies is a miracle of precision and speed. But how do they do it?

No, it is not the planet Earth that moves, but a dragonfly. Australian researchers have followed the flight of a dragonfly (Hemianax papuensis) with three-dimensional cameras, following a prey. And they discovered an absolutely extraordinary trick: the dragonfly, moving continuously, manages to keep its image always in the same point of the retina of the prey.
Move to stay still. The trick is called "camouflage in motion" and in this way, since many optical systems only notice a hunter when it moves, the prey thinks that the object it sees (the hunting dragonfly) is stationary, and therefore does not dangerous.
This behavior involves the continuous adjustment of the position, moving forward and backward or to the side according to the movement of the possible prey. Even if the technique is extremely precise and refined, how do dragonflies carry it out (also considering that they are among the least developed insects) is still a mystery.

(News updated June 5, 2003)