Fungus Gnat

Natural Habitat

Damp environments high in organic matter, such as houseplants, greenhouses, and moist garden soil.

Diet & Feeding

Larvae feed on fungi, algae, and decaying plant matter in the soil; adults typically do not feed but may consume liquids.

Behavior Patterns

Adults are weak fliers often seen running across soil or hovering near light sources; they have a short lifespan of about 7-10 days and lay eggs in moist soil.

Risks & Benefits

Generally harmless to humans but can be a persistent indoor nuisance; larvae may damage delicate plant roots if populations are high, but they also assist in decomposing organic material.

Identified on: 1/5/2026