“Black soldier flies … are one of the most beneficial flies in existence and are considered non-pests. The adult black soldier fly does not have mouthparts and does not feed upon waste. They do not bite, and as only the larva feed, are not associated with transmitting any diseases. Also, this species makes the breeding areas of houseflies less desirable.”

 

Source: https://aggie-horticulture.tamu.edu/galveston/beneficials/beneficial-51_black_soldier_fly.htm