Brown mamorated stink bugs are active from late April to late September. Stink bugs remain in protected locations, such as man-made structures and dead trees, throughout the entire winter, according to North Carolina State University.
Stink bugs appear in homes before the winter when the bugs look for an area to overwinter. Homeowners can keep stink bugs outside by sealing any exterior openings. During the spring, stink bugs living in walls emerge into homes, searching for the outside, as reported by Orkin. Stink bugs were accidentally imported to the United States in the late 1990s and remain a significant pest to agriculture in 2015, as claimed by StopBMSB.org.