Sorry, I’ll put more details : why do files gave trouble to pass through an opening to directly get out of a place? It’s been 20 that fly is trying to get thought my opened window and I just don’t understand!
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Flies are not smart. They have very small quick acting nervous systems, which allow them to avoid your swatting hand, but in terms of strategy or problem solving they are dumb as nails.
Their natural instinct when trapped is to fly upwards. If your window opens at the bottom, they will continue to try to escape through the top of the window, or through the ceiling, even though those are not actual working escape routes.
In nature, flying upwards to get out of bad situations is usually a good bet, which is why flies evolved this instinct. They don’t have the sort of brainpower necessary to re-evaluate a different tact when this doesn’t work, they will just keep trying to escape upwards until they die.
A lot of insects also tend to use the sun for navigation. Flying at a constant orientation to the sun is a good simple way to navigate. But humans have developed tiny little suns that work at night (light bulbs). These confuse bugs, who try to navigate using the sun, and end up flying in circles around the light bulb, or even collide with it.
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