Fungus Gnat

Natural Habitat

Damp, moist environments, often found near decaying organic matter, overwatered houseplants, and in greenhouses.

Diet & Feeding

Larvae feed on fungi, decaying plant matter, and sometimes plant roots; adults typically don't feed significantly or feed on liquids.

Behavior Patterns

Adults are weak, erratic fliers and are often seen near the soil surface of potted plants or flying around lights. Larvae live in the soil. Their presence often indicates overwatering of plants.

Risks & Benefits

Potential risks include damage to plant roots by larvae, especially in seedlings or young plants, and being a nuisance indoors. They do not pose a direct health risk to humans. In nature, they contribute to decomposition.

Identified on: 10/25/2025