In this time they darken in color to a reddish brown. The immature bugs must shed their skins 5 times before becoming winged adults. All nymphs are about as broad as long, dark in color, with red and white or yellow markings on their bodies. Immature stink bugs in the 2nd - 4th nymphal stages are often mistaken for lady bird beetles, but close observation will show that nymphs do not have wings, and they also have glands that emit the strong, characteristic odor. They are usually apple or jade green color, but may occasionally be a reddish brown.
Adults can live for several months.
After hatching, the first stage nymphs will remain on or near the egg mass. This aggregating behavior will continue through to the fourth nymphal stage. Adults are very active fliers. When disturbed they will fly away or fall to the ground or to lower portions of the plant. Their green color blends with the foliage making them difficult to find.