SO, SO GROSS! These are not the standard house fly, horse fly, or any other fly. These are just smaller black flies which hover. We keep our coop and surrounding yard clean, power wash our coop and boxes, change bedding frequently, use mite spray on our girls, keep fresh veg up if not eaten, do not have standing pond water, change their water daily, remove eggs soon after they are lain. We use Fly Predators WHICH WORK GREAT keeping the standard fly away, but nothing seems to get rid of these hovering buggers. I don't even know what they want or what they are after. What do you use? Do you even get them or know what I'm talking about? I am sick of them. THANKS. p.s. I also want to purchase the hanging fly trap nets. There are several stinky baits I could make or purchase but what have you found works best for you for whatever sort of fly you have. What do you use for mosquitoes?