Why insects and butterflies are attracted to light?

Many butterflies and flies gather around street lamps and porch lights, and this is what many scientists call positive photoreceptivity - they are naturally attracted to light.

Whatever the source of this light, it unfortunately can not distinguish if this light is artificially natural. Its attractiveness to artificial light is a harsh trick for it. Before the appearance of man there were no artificial lights and the only light was the moon, the sun and the stars.
The attractiveness of male butterflies to ultraviolet radiation, which radiates from the fire leads to his death as the women of these insects carry a gland containing chemicals that emit ultraviolet rays attract males to it, so the males of the butterfly attracted to the fire to be less recognizable where attracted to the ultraviolet radiation provoked by To make the mating and insist on it, but surprised by the fate of the inevitable in the fire, as for the attraction itself, this behavior seems to be a disease or other evidence of insect infertility, but in fact is a very natural instinct of the insects.

Insects are all attracted to UV rays that radiate from the fire or from any other source of light radiates these invisible rays of the human being, but they are visible and attractive to these organisms, which are not known to many humans, where insects are attracted naturally to the light and there is more explanation because either light It simulates daylight or helps them to fly as they think and guides them on a journey that makes them use stars and the moon in the dark.

There are many opinions about the attraction of insects around the artificial light, it is really very puzzling and there are those who believe that the insect is not attracted to the light itself and I am attracted to the dark areas that surround it. Others point out that their attraction to light is the reason for their sense of safety and protection from predators.

On the contrary, with some insects such as the cockroach, we find that it is a negative object in its attraction to light, so it draws a negative optical attraction, as it hastens to hide in the corners of the room when it ignites the light of your room.