Thousands. Yes, thousands dead in two months. I have a screen porch in Virginia and it keeps most bugs out but the tiny ones do get in. They are really annoying but don't bite. Now with this nothing, and I mean nothing on the screen porch. As far as I can tell it does not attract mosquito's or biting flies even with the scent packet. So step outside the screen porch and your on your own. One important note, keep it at least 12 feet away from activity because there will be a swarm of bugs next to it.