The typical lifespan of a housefly (Musca domestica) is around 15 to 30 days, depending on environmental conditions such as temperature and availability of food. Houseflies generally go through a complete metamorphosis, starting as eggs, then larvae (maggots), pupae, and finally emerging as adult flies. Factors such as humidity, food supply, and predators can affect their lifespan. They are known for their rapid reproduction, which contributes to their overall abundance and presence in various environments.