Fungus Gnat

Natural Habitat

Damp environments rich in organic matter, such as houseplants with moist soil, compost piles, and greenhouses.

Diet & Feeding

Larvae primarily feed on fungi, algae, and decaying plant matter in the soil; they may also damage plant roots. Adults do not feed or only consume liquids like water or nectar.

Behavior Patterns

Weak fliers that are often seen scurrying across or hovering near the surface of moist soil. They are highly attracted to light and moist environments for egg-laying.

Risks & Benefits

Generally harmless to humans as they do not bite or sting. They are primarily a nuisance in homes, although their larvae can damage fine root hairs of houseplants and seedlings if populations are high.

Identified on: 2/18/2026