Fruit flies need a place to live so they may deposit their eggs, grow their young, and feed on rotten or overripe fruit. Their optimal habitat is one that is chilly, shaded, and damp. Your opinions on this, please? your kitchen sink’s drainpipe. This is the home of a fruit fly, in their ideal world. It is cluttered with food scraps and is dark and wet. If you have a clog or a plumbing issue, it is especially critical to keep this in mind. The room is dark and musty when the drain in the sink is backed up. Why are they gathering in a place that is poorly lit? to lay their eggs in the ground? I was talking about their eggs, as you properly understood. As many as 500 eggs can be laid by them. The larvae, which hatch from the eggs, populate your kitchen and consume your food much as their parents did.