Fungus Gnat

Natural Habitat

Commonly found indoors around houseplants, especially those with overwatered soil. Outdoors, they inhabit damp environments rich in decaying organic matter, such as compost piles, shaded areas, and forests.

Diet & Feeding

Adult fungus gnats primarily feed on liquids and do not bite. The larvae feed on fungi, decaying organic matter, and plant roots, especially in moist soil.

Behavior Patterns

Fungus gnats are typically attracted to light and moisture. They can be seen flying around houseplants, decaying organic matter, and damp areas. Their larvae live and feed in the soil or decaying matter. Adults are not strong fliers and often appear to 'hop' or walk on surfaces.

Risks & Benefits

Potential risks include being a nuisance, especially indoors. While adults are harmless to humans, the larvae can damage plant roots, leading to wilting, stunted growth, and yellowing foliage, particularly in seedlings and young plants. They are generally not considered beneficial in home settings due to potential plant damage. In natural ecosystems, they play a minor role in decomposition.

Identified on: 7/1/2025