The depicted image demonstrates a diverse stages of the fly life cycling process. In general, it consists of seven phases beginning from hatching of eggs to adult fly which will lay the egg latter, particularly the female species. It is also noticeable that the fly spends around 2-4 weeks, on average, to complete its life cycle.
The phase life of a fly begins when the mature insect lays its eggs. Then, it will hatch for 8 to 24 hours before turning into larva. After passing that phase, the eggs start being a larva which is divided into three stages. We can see that between 4 to 7 days, the first stage is small larva that will grow bigger on and on until the third larva stage.
Embarking on the new phase, the larva changes to be pupa which has greater size and more fat than before. It takes place from 10 to 20 days to transform during pupa stages. Next, it start to be young adult of fly that involved 2 wings and some feet place on its body. After 20 days, fly grow in size and become mature fly. Once the whole process is completed, the adult female fly ready to reproduce and lay more eggs.