Winged ant, coloured scanning electron micrograph (SEM). Winged ants develop after an ant colony has been established for several years. These winged forms are reproductive forms, and usually emerge in large swarms following heavy rain. Mating takes place over a day or so, then the males die while the females disperse to establish new colonies. Magnification: x12.5 when printed at 10 centimetres across. Magnification: x12.5 when printed at 10 centimetres across.