Fungus Gnat

Natural Habitat

Damp soil, decaying organic matter, and indoor houseplants with high moisture levels.

Diet & Feeding

Larvae feed on fungi, algae, and decaying plant material in the soil; occasionally they feed on plant roots. Adults do not eat but may drink water.

Behavior Patterns

Adults are weak fliers often seen crawling on soil or flying near light sources. They have a short lifespan of about one week and undergo complete metamorphosis.

Risks & Benefits

Generally harmless to humans but can be a nuisance. In large numbers, larvae can damage plant roots, especially in seedlings or stressed plants, and may spread soil-borne diseases.

Identified on: 6/9/2026