Fungus Gnat

Natural Habitat

Damp environments with high organic matter, such as overwatered houseplants, greenhouses, and moist soil beds.

Diet & Feeding

Larvae feed on fungi, algae, and decaying organic matter in soil; adults typically do not feed or only consume liquids like nectar.

Behavior Patterns

Adults are weak flyers usually seen crawling on soil or flying near light sources. They have a short life cycle of about 3-4 weeks from egg to adult.

Risks & Benefits

Generally harmless to humans but can be a nuisance indoors. Large larval populations may damage plant roots, while they benefit ecosystems by aiding in the decomposition of organic matter.

Identified on: 5/1/2026