When I was a child we thought they were precursors to thunderstorms if you could kill 100 of the big ones the storm wouldn't happen. As they don't come out before storms, I thought it worked. Love storms now
We had them last week, horrible things.
They’ve managed to excavate under and into the conservatory. We were away for a few nights and came back to a conservatory full of them, been trying to eradicate them ever since, to the point I’m now obsessed by the blighters!