Fred, I’ve released 100’s of thousands of BSF larvae on my property and I can tell you there is no such thing as a “swarm of black soldier flies”. The adult flies don’t eat and they only live for a few days. During that time they only want to mate and lay eggs, after that they’re gone. They rarely land on people or enter houses, and they don’t bite or sting. Even with two large colonies of larvae I rarely see an adult black soldier fly. Also, the presence of BSF larvae in compost is a repellent to other fly species, most of which ARE pests.

Black soldier flies are called Window flies because if they accidently enter a house they will constantly try to exit and therefore they usually go to a window. They are attracted to rotting food so they have no interest in the fresh food in your house. They will beat themselves to death trying to fly through a window and if you see one trapped it’s good thing to gently capture them in a cup and release them outdoors. They fill an important niche in nature and they do not spread disease like their cousins the house fly.

jerry