The life cycle of the blowfly is fairly simple and quick. An adult female blowfly lays her eggs (up to 2,300) on the flesh of a dead animal. Depending on the species, the larvae will hatch in only a few hours or a few days. The maggots will bury themselves deep in the animal’s tissue to feed and go through their three developmental stages. After several days the maggots will leave their food source and enter into nearby soil to pupate. Within a few days, the blowfly will emerge from the soil as an adult, completing the life cycle.
Because these flies land on feces and dead animals they can carry dangerous diseases and bacterium their bodies. If they land on human food or food prep areas they can spread and infect people with some very serious diseases. Blowflies can spread bacterium that can cause severe diarrhea and cholera, along with other pathogens that include plague, anthrax, tularemia, and tuberculosis.