A housefly’s life expectancy is no more than a month. On the other hand, a fruit fly can live up-to forty to fifty days You must be thinking, if flies have such a short life span, how come they are everywhere and not extinct yet.
There is not one single answer to this question as flies eat almost everything – from human foods to excreta. Flies can even feed on sweat. Moreover, they can either suck liquid foods or readily soluble foods.
Food and water are essentials for every living thing, be it a mere fly. As mentioned above, water is a vital source of living potion for these tiny creatures.