Black Solider Fly The black soldier fly undergoes five main stages in its life cycle: egg, larval, prepupal, pupal, and adult stages . The longest phase of its life cycle is spent in the larval and pupa stages, whereas egg and adult stages are relatively short. Females lay between 500 and 900 eggs . On average, the eggs hatch in four days and vary with season, region, and temperature. There are six instars in the larval phase, and the larvae range in size from 1.8-20 mm, with 20-mm larvae being referred to as mature larvae. The emerged larvae from the eggs initiate feeding immediately on different types of organic matter, including animal manure, decaying fruits and vegetables, and food waste, with consumption rates increasing considerably after the 3rd instar . When the larvae reach the 6th instar, they undergo melanization resulting in a darker coloration of the cuticle to become prepupae. In this stage, the insect empties its digestive tract and ceases feeding. The prepupae then migrate from their food source to dry crevices to metamorphose into pupae in 7-10 days. The pupal stage, during which larvae do not move nor eat for at least 8 days, ends with the adult emergence. The adult fly feeds on nothing except water and relies on the fat stored in its larval stage. It does not harm crops, pollute the environment, spread diseases, invade homes or restaurants but rather lives remotely from humans, maturing and mating primarily in shaded areas. The fly mates and lays eggs in 5-8 days. Shortly after having oviposited, the female dies .