Immediate after the rain, winged insects in large number seen over light are mainly sexual forms of termites ( mainly, Odentotermus obesus). Termite colonies in wild intended for proliferation, start producing alate males and females in advance before rain. They come out in large numbers ones rain starts and being highly phototrophic rush towards light nearby.These alates are actually on their nuptial flight. After mating males meet their natual death while females are ready to start new colonies.Wings of these alates are highly fragil. They drop down on little jerk. More than 99% of them go unmated and finished off mainly by predators.Locally known as 'Rain Flies' which is not the scientific name but called that as their presence usually means it's going to rain.