Both fungus gnats and fruit flies are tiny black flies in the house that cause intense nuisance. The presence of these little black flying bugs is a sign that your property has stagnant water problem, dampness, decaying organic wastes, and choked drains. These are all the sources of these black flies.

The small black flying bugs in your house are most likely fungus gnats. These insects are slightly smaller than fruit flies and resemble tiny mosquitos. They are attracted to light and damp places with mold and decay. Fungus gnats like to breed in house plant soil and underneath drains.

If the flies are small, black, and flying around windows or potted plants, they are probably fungus gnats. They are small, delicate black flies that are weak flyers and often fly around the house in search of food. If you see these flies around your house, you can be sure that you are dealing with a fly infestation.