The stink bug is a type of insect belonging to the family Pentatomidae. These bugs are known for their distinctive shield shape and can vary in color, often appearing in shades of green or brown. They are commonly found in gardens and fields, where they feed on plants by piercing the leaves and sucking out the sap. Stink bugs are named for the unpleasant odor they release when threatened or crushed. This odor serves as a defense mechanism against predators. They are most active during warm months and can become a nuisance when they invade homes seeking shelter during colder weather.