Fungus Gnat

Natural Habitat

Damp environments with decaying organic matter, such as houseplant soil, greenhouses, and moist woodlands.

Diet & Feeding

Larvae primarily feed on fungi, algae, and decaying plant matter in the soil; occasionally, they will feed on plant roots. Adults typically do not feed or may consume water and nectar.

Behavior Patterns

Adults are weak flyers and are often seen scurrying across surfaces or flying erratically near lights or moist soil. They have a short life cycle of about 3-4 weeks, transitioning from egg to larva to pupa to adult.

Risks & Benefits

Generally harmless to humans as they do not bite or sting. However, in large numbers, the larvae can damage the root systems of houseplants. They are mostly considered a nuisance pest in indoor environments.

Identified on: 1/1/2026