It could be ants or it could be termites. Many ants have wings while they are getting ready to re-nest. This is the time of year both ants and termites will be swarming. Carpentar ants can be a big problem as well as termites. We have battled both, and prefer to use a exterminator for those jobs. Carpentar ants will often take over area's that have been previosly decayed from termite damage, or rotting wood.
Both ants and termites will drop their wings fairly quickly as they are only used to swarm to a new location, usually a short distance.
Termites have bodies that are tubular sections (like tiny sausages) while ants have more rounded portions.