Stink bugs, recognized by their distinctive shield-shaped bodies, are a common sight, especially as seasons change. These insects often prompt questions about their capabilities, particularly their ability to fly.
The Truth About Stink Bug Flight
Adult stink bugs possess two pairs of wings and are fully capable of flight. The outer pair, known as forewings, are hardened and somewhat leathery at the base, serving as a protective cover. Beneath these, the hindwings are membranous and actively used for flight. When not in use, these wings fold neatly over the stink bug’s back, giving them their characteristic shield-like appearance. Immature stink bugs, called nymphs, do not have developed wings and cannot fly.
Understanding Stink Bug Flight Patterns
Stink bugs utilize flight for various purposes, including searching for food, finding mates, or escaping threats. Their flight is often described as clumsy or erratic, characterized by unpredictable paths. They produce a distinct buzzing sound during flight, often heard before the insect is seen. While capable of flying moderate distances, they often prefer to walk or crawl.
Flight activity increases during mating season in spring and summer, when they become more active in locating mates and suitable egg-laying sites. Most notably, stink bugs fly in late summer and early fall to seek warm, sheltered overwintering locations, often congregating on the sunny sides of homes before finding entry points. They are also attracted to artificial lights, which can cause them to fly toward windows and indoor lamps. Some individuals, particularly the brown marmorated stink bug, can fly significant distances, traveling over 5 kilometers in a day.
Dealing with Flying Stink Bugs
Encountering flying stink bugs indoors can be unsettling, but they are not harmful to humans or pets and do not bite. Avoid squashing them, as this releases their characteristic pungent odor, which can linger. This defensive smell, often compared to cilantro, is produced from glands on their abdomen.
Instead, non-harmful removal methods are recommended. Gently sweep them into a container or use a vacuum cleaner with a stocking over the hose to capture them without releasing the odor. Once collected, release them outdoors away from the home or drop them into soapy water to drown them. To prevent entry, seal cracks around windows, doors, and utility pipes, and repair damaged screens.