how do bugs know you’re about to capture or kill them? They move faster than usual.
In: Biology
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Also take into account that relatively speaking, humans are slow creatures. You make think that you are swatting a fly quickly, but by the time your brain told your hand and wrist to begin moving, a fly sensed that change your hand and before your arm even extended, it’s wings began beating. We are so slow at processing deliberate movement, that some of our limbs evolved bypass circuits (reflexes) that allow the muscle to move without having to tell the brain first, in order to protect it from damage.
They sense your approach and try to escape. In most cases they simply see you, with their eyes, getting closer and move away as to not be eaten/captured. I’m not an expert, but I’m sure there are some insects can use other senses to detect you. But bottom line is, like with most other animals, they just notice you and are scared and run away.
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