Fungus Gnat

Natural Habitat

Damp, organic-rich environments such as potting soil, compost, decaying leaves, and other moist areas. Often found indoors near houseplants.

Diet & Feeding

Larvae feed on fungi, decaying organic matter, and sometimes plant roots. Adults do not feed or feed on liquids such as nectar.

Behavior Patterns

Adults are weak fliers and are often seen walking or flying near the soil surface of potted plants or other moist areas. Larvae live in the soil. They are attracted to light and moisture and their life cycle from egg to adult can be as short as two weeks under ideal conditions.

Risks & Benefits

Potential risks include being a nuisance pest indoors due to their presence. While larvae can occasionally damage tender plant roots, especially seedlings, significant damage to healthy plants is uncommon. They do not bite humans or transmit diseases. They may play a minor role in nutrient cycling by breaking down organic matter.

Identified on: 11/19/2025