The tiny flying insects that you may see that we call “gnats” can be any of many species. Depending on species, gnats can be biting or non-biting and will feed on plants, other insects or blood. Most commonly gnats are simply fruit flies or fungus gnats.
The small size of gnats make it appear as a less serious pest, but gnats reproduce very quickly and can populate infested areas in swarms. Gnats can very quickly become a large problem to homeowners or apartment residents.
The main showing of gnats are sightings adults as they fly about in the air. Male gnats often assemble in large mating swarms or ghosts, particularly at dusk.