As a stress response, an orange secretion is secreted from gland openings in the thorax.

Clogging of the sebaceous gland openings with skin mites called demodex folliculorum, which live in facial hair follicles.

It would, however, have produced silk from a series of silk gland openings, or spigots, located across plates on the underside of the abdomen.

The gland openings of some African bombardier beetles can swivel through 270 and thrust between the insect's legs, discharging the fluid in a wide range of directions with considerable accuracy.

They differ from the similar green stink bug (Acrosternum hilare) by the shape of their scent gland openings, which are short and wide in N. viridula, and narrow and long in the green stink bug.

A bird will typically transfer preen oil to its body during preening by rubbing its beak and head against the gland opening and then rubbing the accumulated oil on the feathers of the body and wings, and on the skin of the feet and legs.