Every spring I see numerous flying ants on the tongue and groove ceiling of my living room but they are only visible for a few days. Should I be concerned. John J. Gulf Islands.
Yes you should be concerned. Winged ants indoors in early spring are a likely sign of carpenter ant nests. They are commonly found in wood ceilings. A local professional will confirm this problem and give you an estimate for treatment.
See: http://pestcontrolcanada.com/ants/carpenter-ants for photos and more information.