One of the main reasons flies are so hard to kill is that they have compound eyes that have a wide field of vision. This helps them avoid being swatted and enables them to detect threats from all sides. They also have an incredibly sophisticated brain that helps them make use of their eyes and body to process light into images. The brain and eyes work together to convert light into images and the speed at which they do this will determine how well they see in a certain situation.
Flies are incredibly fast. Their wings can flap 200 times per second and they can change direction in less than a hundredth of a second. Their brains are also similar to those of houseflies and help them remember and learn what is going on. Because they are so fast, they can move away and survive.
Flies are attracted to rotting fruit. They also like fermented liquids because they contain microbes that make it a food source for these insects. The best way to get rid of fruit flies is to make sure you clean up after rotten fruit.
Flies can also be a problem for humans. They can be incredibly irritating and can cause a great deal of stress. In fact, it has been estimated that flies cause $2 billion in losses to U.S. agriculture each year. Furthermore, flies can also cause a high level of infection in livestock due to their constant bites and gnawing. Not only is this uncomfortable, but flies can also lead to high vet bills.