There are thousands of species of stink bugs throughout the world. Two of the most well-known species are the brown stink bug (Euschistus servus) and the green stink bug (Acrosternum hilare or Chinavia hilaris). Both are commonly found throughout the US and other countries, particularly in Asia, where many species are thought to have originated.
Stink bugs range in color from brown to brilliant green, although many are duller shades designed to blend in with vegetation; a few, however, have bright orange markings that are thought to serve as a warning to predators. Nearly all species are distinguished by a triangle- or shield-shaped plate on their backs. Stink bugs are part of an order of insects sometimes called “true bugs,” which do not chew with their mouths; instead, they have a proboscis that allows them to suck the liquids out of plants.