Last year we even made the news that the flies were over populated up here. I think it is in part to all the farmers spraying manure on their fields. Went out to feed the ducks and when I opened there house there were hundred of flies in there, Guess I need to clean it out today. We have the frogs, plenty of black snake around here and the ducks help also along with 4 fly traps. Just have to deal with them again.