Why Flying Insects Are Attracted to Light
WouterIt isn’t entirely clear why flies like light, but one possible explanation is that they are attracted to light as a beacon. As flies, they have multiple lenses and may see light as a beacon. It is difficult for them to adjust to the dark, so light is attractive to them. However, there are ways to avoid attracting flies, such as by keeping animal feces away from light sources.
Some flies and moths have an innate attraction to light, and they may use it to get away from predators. Light from porch lights, for example, can fool moths into thinking they are escaping. Moths are also attracted to artificial light sources, which can fool them into thinking that there is a safe escape route.
There are several theories about why flies like light. However, scientists have yet to find a scientific explanation for this phenomenon. One reason is that flying requires a large amount of energy. During the day, insects can keep their alignment with the sun by spotting a light source. However, at night, insects cannot differentiate between a light bulb and a distant light source. Because of this, they end up flying into the light and endanger themselves.
Another reason that bugs are attracted to light is that they use it as a navigational aid. For example, when a fly is flying north, it will judge the direction by keeping a natural light source on the right. The natural light source must be constant and at a distance, so an incandescent porch light will confuse insects. Another theory is that insects like light as a source of warmth. As night temperatures are typically cool, insects may be circling around light sources to stay warm.
