Fruit Fly Information At one time or another, we've all experienced fruit flies in our home or kitchen. But did you know they don’t actually come from fruit? In this video below by Pestworld, learn the facts of fruit flies. For instance, instead of coming from decaying fruit itself they are actually attracted to the yeast produced by fermenting fruit and can track it from great distances. They are also to easily come into our homes, as their tiny size allows them to sneak through even the smallest of cracks. Plus, sometimes their eggs may already be on the fruit we purchase at the store. So what can you do? Always check fruit that is left out for signs of over ripening. The riper the fruit, the more likely fruit flies will appear.