Never heard of such reasons before.
I wonder about that too. Could be it was never “important” enough to report whenever it might happen.
Some claim this swarm is heavier than they’ve experienced before - but I don’t know for sure. This may be the first time I’m really paying attention.
They are flying like idiots everywhere and there are millions per acre, and they are big, so jet engines (?) sucking it in could really be crippled. I could see that, the way things are.