Today I will be going to the lumber yard as I plan on building a Manitoba fly trap. If you google it there are plans with dimensions. Friends bot the EPPS trap and are pleased as to how it has cut down on the biting flies. Last year I set up a Mosquito Magnet that uses propane and an attractant and for the first time we could sit out in the yard and I'm surrounded by forest and swamp. Also I bot a $10 wading pool and put a couple of inches of water in it plus a couple of drops of dish detergent. I emptied without fail on the third day and moved it. The mosquitoes want quiet water to lay their eggs which hatch in about 3 days. By dumping the pool the wrigglers die and don't become adults. The wading pool was about a hundred feet from the Magnet to get the ones the Magnet doesn't attract. The little basket in the Magnet was packed full of dead mosquitoes every day. A small fan dehydrates them. I have a couple of light blue trash barrels that store feed. I notice that when the sun is in the west the front side of these barrels were covered in biting flies. I plan on taping clear plastic to the barrels and smearing it with Tanglefoot (very sticky stuff). The flies will stick to the plastic film. Simple matter to remove it and replace with more plastic film and Tanglefoot. I'm trying to be pro-active rather than resorting to chemicals. A dark barn offers a reprieve from the bugs so do what you can to darken it and the bugs will stay out.