The reason why they stubbornly come at us, even though we expel them with our hands, is that our bodies are almost like a buffet for them. The chemicals our bodies secrete during the day attract them.
When we try to kill the flies, which are annoying especially in summer, they somehow manage to escape. They owe their success to their design.
Flies can see and take action four times faster than us.
In other words, flies live life in slow motion. To give a rough example; 1 second of a fly seems like 4 seconds to us, it sees us as if we are moving in a pool. You can visualize the scenes of fast characters like Flash.
There are two different types of cells that are sensitive to light. We call the microvillar photoreceptor found in the fly’s eyes. The ones in our eyes are called rod and cone cells. In flies, the microvillar structure is much more sensitive and responds faster. When we try to catch the fly, it escapes thanks to its super fast vision. In this way, the eye, which consists of thousands of receptors, can capture the light much more easily.
If you find it difficult to catch normal flies, look at the so-called “killer flies”.
They can see six times faster than us. They catch other flies in half a second. These flies are faster than the blink of an eye. The speed of the photoreceptors is the fastest ever measured. They force the speed of reaction to something.
As you hold up the rolled newspaper to kill the fly, the fly’s brain starts to calculate where the newspaper will land. The fly instantly puts its body in a perfect position and prepares to make an escape maneuver. If your hand moves forward, the fly’s legs will curve back to help it fly in the other direction.
The fastest flying insect in the world is the dragonfly. Its speed is 55 km per hour.
In other words, it is the speed we reach when descending a steep slope with a bicycle.
Sources: 1, 2
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