Brown Marmorated Stink Bug
Halyomorpha halys · Garden & Overwintering Pests
The brown marmorated stink bug is an invasive, shield-shaped bug from Asia that damages fruit and vegetable crops. In late summer and fall the adults gather on sunny walls and squeeze into homes to spend the winter, sometimes by the hundreds. They do not bite or damage houses, but they give off a strong smell when crushed and can bother people who are allergic to the odor.
Look for: A shield-shaped, mottled brown bug about 5/8 inch long with white bands on its antennae and alternating light and dark bands along the edge of the abdomen.
Quick facts
| Size | 16-17 mm |
|---|---|
| Legs | 6 |
| Usual colors | brown |
| Where in the home | Living Room, Bedroom, Garden |
| Active | All year |
| Peak | Sep, Oct |
| U.S. range | Invasive from East Asia, first collected in Pennsylvania in 1998; detected in 47 states as of 2021. |
| 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
Sources
Not sure this is your bug? Try the Bug Identifier or ask your local Cooperative Extension office.