We recently had a plague of flies. I'm pretty sure that they were the descendants of the the plague of flies in Exodus.

"There came great swarms of flies into the house of Pharaoh and into his servants' houses. Throughout all the land of Egypt the land was ruined by the swarms of flies."

I bought some fly paper when I saw 15 swarming around my daughter's face when she was trying to enjoy a bottle. The final fly death toll was nearly 175!

Here are a few pics of the flies: