Fruit flies typically live for about 40 to 50 days under optimal conditions. Their lifespan is heavily influenced by temperature, with warmer temperatures generally extending their life. Female fruit flies can mate and lay several batches of eggs during this period, which allows their populations to multiply quickly. The entire life cycle, from egg to adult, can take about a week to several weeks depending on conditions such as temperature. In colder temperatures, their development slows or stops entirely, reducing their lifespan or activity. Fruit flies generally thrive during warmer months such as summer and fall when food sources are abundant. Without food or water, they may only survive a few days.