Fungus Gnat

Natural Habitat

Damp, organic-rich environments, often found indoors near houseplants, in potting soil, or areas with moisture build-up.

Diet & Feeding

Larvae feed on fungi, decaying organic matter, and plant roots. Adults do not feed significantly or may consume liquids like water or nectar.

Behavior Patterns

Adult fungus gnats are weak fliers and are often seen near the soil surface of potted plants or attracted to lights. They have a short lifespan of about a week. The females lay eggs in moist soil, and the larvae develop there, feeding on organic material and sometimes plant roots. They can reproduce rapidly under favorable conditions.

Risks & Benefits

Risks: Larvae can damage plant roots, especially in seedlings and young plants, leading to wilting, stunted growth, or plant death. They can also be a nuisance indoors. Benefits: Adults are pollinators to a limited degree, and larvae contribute to decomposition of organic matter in natural environments.

Identified on: 11/27/2025