Actually both do. The winged versions of these pests are the reproductives that the colony sends out to try and start new colonies. It is important however to know if it is an ant or a termite. Winged ants are harmless and their presence means that there is a nest, usually outside the home, and they were attracted to a light inside. Termites if found inside, are an indication that a termite colony is probably feeding on your home and a treatment is needed.