The brown marmorated stink bug is a shield-shaped insect and is mottled brown and gray in color. They have alternating white and black bands on their antennae and black and white alternating pattern surrounding its wing. They have smooth shoulders without spines.
Brown marmorated stink bugs are a nuisance because they congregate indoors over winter and can annoy building occupants. They over winter in cracks and crevices in buildings. They emit an unpleasant odor when smashed. They are not a health threat, but they can cause damage to host plants.