Fungus Gnat (likely Sciarid Gnat)

Natural Habitat

Damp, moist environments, especially decaying organic matter, overwatered potted plants, greenhouses, and occasionally indoors near sources of moisture and organic debris.

Diet & Feeding

Adult fungus gnats typically don't feed much, if at all. Larvae primarily feed on fungi, decaying plant matter, and sometimes the roots of plants.

Behavior Patterns

Adults are weak flyers and often seen crawling on surfaces or flying erratically near damp areas. Larvae live in the soil or growing medium. They have a short lifespan as adults (about a week).

Risks & Benefits

Potential risks include being a nuisance indoors, and larvae can damage plant roots, especially in seedlings or young plants, leading to wilting or stunted growth. They are generally not harmful to humans. Benefits are minimal, though they can contribute to decomposition of organic matter in natural environments.

Identified on: 11/29/2025