@heirloomgal , i dont see much for flys anywhere on the property; even around the compost or bunnies And certainly not in the garden. You’d think with this many in a trap (in a two week period) you would see them elsewhere. Also; the traps are within 50 ft. Of each other. In this general vicinity the poly drum is located where i render salmon carcasses. The drum is entirely sealed with no fly’s in evidence around it either. kind of a mystery to me where they all come from but im happy to have found a way to control them. Now if someone would make a scent based trap that worked this well for mosquitos id be in hog heaven.