Earwigs, recognized by their distinctive rear pincers, can pinch humans. This action is generally harmless. While their appearance might seem intimidating, the sensation of a pinch is typically mild. This insect is not aggressive and usually only pinches when threatened or handled.
The Earwig’s Pincers
The forceps-like appendages at the end of an earwig’s abdomen are scientifically known as cerci. These cerci are a feature of earwigs, part of the insect order Dermaptera. Male earwigs generally possess more curved and sometimes larger cerci, while females have straighter ones. These structures are composed of chitin, the material found in their exoskeleton.
Earwigs utilize their cerci for various functions, including self-defense against predators, capturing prey, assisting in folding their membranous wings, and mating rituals. When an earwig pinches, the sensation is usually a light nip or mild pinch, comparable to a fingernail. It rarely breaks the skin or causes significant pain. Earwigs are not venomous, so their pinch does not inject toxins. Any discomfort typically passes quickly.
Why Earwigs Pinch
An earwig’s pinch is primarily a defensive action. They are not aggressive towards humans and do not actively seek to pinch people. They typically use their cerci if threatened, handled, or accidentally squeezed. Their natural instinct is to escape rather than confront.
The pinch serves as a deterrent to potential threats. Some species can also release a foul-smelling chemical from glands on their abdomen as another defense mechanism, primarily for deterring predators. This behavior highlights their role as scavengers and decomposers, rather than attackers, in their natural environment.
Living Alongside Earwigs
Earwigs prefer moist, dark environments, seeking shelter during the day and emerging at night. Indoors, they are commonly found in damp areas like bathrooms, kitchens, basements, and crawl spaces, or near leaky pipes. They can enter homes through small cracks and gaps around doors, windows, and foundations, or be brought in accidentally with items like newspapers or potted plants.
To prevent earwigs from entering your home, reduce moisture by fixing leaks, improving drainage, and using dehumidifiers. Sealing cracks and crevices and ensuring screens fit tightly can also help. Removing outdoor hiding spots such as leaf piles, mulch, and decaying wood near the foundation can deter them. If earwigs are found indoors, they can be safely removed by vacuuming, or by using simple traps like rolled-up newspapers or dishes with a mixture of oil and soy sauce. Soapy water or rubbing alcohol can also be sprayed directly on them. Earwigs are generally harmless to humans and are considered more of a nuisance pest.