When looking for a mate, flies will gather around a noticeable landmark such as a bush or under a tree. When indoors this is commonly under a lampshade or equivalent. Potential mates will head towards this landmark looking for candidates. Since flies are poor at hovering they will circle around the area.Click to see full answer. Also asked, why do flies gather on my porch?Porches provide a place to relax and enjoy a cool breeze during the hot summer months—until the flies show up. Flies swarm your porch for the food and breeding places it provides, bringing noise and disease along with them. Keep flies off your porch with preventative methods.One may also ask, how do I get rid of flies circling in the middle of a room? Add some water, some vinegar, and a small amount of dishwashing detergent. Cover jug/bowl tightly with cling wrap. Poke a few holes in film – just large enough for flies to crawl through. Leave it out in room. In this way, why do flies land on the same spot? Because they leave a scent so they can come back to it. Just like where ever you kill a fly another fly will laand in that same spot. They are caught in your gravitational well and don’t have the power to reach escape velocity, so they go into a suborbital trajectory and keep returning to the point of origin.Why do flies hover over your head?Flies are exploring and looking for resources, mates, spots in the sun to warm up. They are also constantly smelling the air and investigating potential resources. Your face, eyes, mouth, nostrils (ever had a fly hit you right in the nostril?), ears etc. are all high contrast areas that get their attention.