Fungus Gnats
Sciaridae (dark-winged fungus gnats) · Flies & Gnats
Fungus gnats are small, dark, long-legged flies whose larvae live in damp potting soil and feed on fungi, algae and fine roots. They usually point to houseplants that stay too wet, especially after plants come indoors for the cold months. The adults do not bite and are mostly a nuisance.
Look for: A slender black fly with long legs and antennae that flutters weakly around the soil surface of houseplants.
Quick facts
| Size | 2-3 mm |
|---|---|
| Legs | 6 |
| Usual colors | black |
| Where in the home | Living Room, Kitchen |
| Active | All year |
| Peak | Nov, Dec, Jan, Feb |
| Bites or stings people | No |
Seasons are typical across much of the U.S. and vary by region.
Peak season Active Typical across much of the U.S.; varies by region.
Often confused with
Fruit FliesDrosophila spp. (mainly D. melanogaster)A tiny fly with a tan front half, a darker rear and bright red eyes that hovers around ripe fruit, wine or the trash can.
Drain FliesPsychodidae (moth flies; e.g. Psychoda spp., Clogmia albipunctata)A tiny gray, hairy fly with wide moth-like wings folded roof-style over its body, usually resting on bathroom walls near a drain.
Sources
Not sure this is your bug? Try the Bug Identifier or ask your local Cooperative Extension office.