What Attracts Brown Marmorated Stink Bugs to Your House?

Brown marmorated stink bugs overwinter in the wild in dry, tightly confined spaces — field research on natural landscapes found them recovered specifically from dry crevices in dead, standing trees with thick bark, particularly oak and locust. That's the ecological template the species is built around: a dry, tight, insulated void. A house offers the same physical qualities in its siding gaps, attic voids, and wall cavities, and Virginia Tech Cooperative Extension notes this species seeks out barns, storage buildings, vehicles, and homes for exactly that reason during fall.

Our old page's "shelter and warmth" framing gets the shelter half right, but it also claimed they look for a place to sleep through winter using a word reserved for mammals — insects do not hibernate; the correct term is dormancy, and warmth wasn't the accurate draw either (dryness and confinement are). See the FAQ below for more on that word choice.

This species does not feed or reproduce indoors; once inside a dry wall void or attic, it's dormant, waiting out the winter the same way it would in a dead tree outdoors — and it does not hibernate there, technically speaking: hibernation is a term reserved for mammals undergoing a controlled, physiological reduction in body temperature, while insects instead enter dormancy or diapause, a different biological process. Warm midwinter days can rouse individual bugs into moving around inside the house, which is often mistaken for a new infestation when it's really the same dormant population waking up briefly.