Origin of Stink Bugs

Where did the invasive Brown Marmorated Stink Bug come from?

This stink bug is native to China, Korea and Japan, and it is thought that they first came to the United States in shipping containers arriving from Asia.

These bugs were first identified in Allentown, PA in 2001, although they probably arrived here several years earlier. 

Since becoming established in Pennsylvania, the Brown Marmorated Stink Bug has spread throughout the Mid-Atlantic States and has also been spotted in many southern and midwestern states. Known as hitchhikers, stink bugs will soon appear across the US – thanks to human travel. 

Since they are strong fliers, Brown Marmorated Stink Sugs can fly to a new habitat, or may even hitch a ride in shipping containers or on cars.

Seasonal Habits of Stink Bugs

Spring and Summer: 

Highly active in the spring, usually around May when warm weather hits. Activity increases as Stink Bugs attempt to get outdoors. They lay eggs under leaves – nearly 400 of them that will hatch in 3-7 days.

Fall: 

Adults overwinter inside, seeking warmth. Often found on the southern or western exposures of buildings when cooler weather arrives, where they receive the most direct sun. They will enter through any crack of crevice in a structure.

Winter: 

Once indoors, Stink Bugs cluster in groups. Warm winter days or heating may trigger activity indoors. During the winter they do not reproduce and feeding on indoor plants is unlikely

Call Ehrlich at for more information on stink bugs or learn more about how to get rid of stink bugs.