Many Hemiptera suck plant juices although some have evolved to suck blood and body fluids. Hemiptera groups include water scorpions, water boatman, backswimmers, water striders, plant bugs, bed bugs, assassin bugs, flat bugs, seed bugs, red bugs and stink bugs.
Stink bugs are named for their ability to exude a foul smelling substance from a pore on each side of their thorax. These bugs often have symbiotic relationships with bacteria that aid the insect in the production of nutrients. Other insects, like termite, have similar relationships that aid in their digestion of wood. Stink bugs are predacious on other insects, good fliers and are recognized by a large triangular scutellum on their back.