Flies thrive in most places but thrive most noticeably where there is garbage, rot, waste, and dead plants and animals. Flies, like cockroaches, are carriers of bacteria that could cause sickness. They can easily thrive in most environments and multiply rapidly. Once flies become a problem you often need professionals to get rid of them! If you have a fly problem in Muskoka, Orillia or the surrounding area contact TK Pest Control! www.TKPestControl.com