After warm weather and summer rain, flying ants emerge from nests for a mass mating event to ensure survival and dispersal of the species
A steady stream of black ants scurries in and out of a crack in the patio. They have been living there quietly for weeks. Perhaps you tried to get rid of them – especially if they were taking sugar from the kitchen or crawling across your bedroom. Perhaps you ignored them, or marvelled at their ability to navigate over apparently featureless paving stones back to their nest.
Then we have a spell of warm weather, a summer downpour, and when it stops there are winged explorers erupting from the ground – welcome to flying ant day!
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Source: Guardian Climate Change