How long does the larva stage of a fly last before becoming pupa?

The larval stage of a fly, often referred to as the maggot stage, typically lasts up to two days before the organism transitions into the pupal stage. During this time, the larva undergoes significant growth and development, feeding voraciously to accumulate energy reserves for the next life stage. After this critical feeding period, the larva finds a suitable location to pupate, where it will undergo metamorphosis into an adult fly. This lifecycle process highlights the efficiency of flies in their developmental stages and the ecological roles they play in decomposition and nutrient recycling. Understanding this duration is vital for studies in entomology and various biomedical applications, including insect behavior and population dynamics.