the Met Office last year thought they were rainstorms.The sudden increase in the numbers of flying ants above ground happens during mating season, when all at once huge flying ants seem to emerge out of nowhere all over the UK.
Queen ants emerge from their nests in the hunt for a new partner to start a colony with sending the insects into a frenzy. Flying Ant Day happens every year during summertime when the weather heats up and the period can actually last for several weeks – but usually builds up to one day where there are millions flying around.