Earwig Amazing Facts — The Insect With Pincers, Hidden Wings and Surprisingly Devoted Motherhood

The earwig is one of the most misunderstood and most unfairly maligned insects in the garden — a creature surrounded by myths, including the entirely false belief that it crawls into human ears at night. In reality, the earwig is a fascinating insect with remarkable folding wings, powerful defensive pincers and one of the most extraordinary examples of maternal care found in any insect species. Here are the most amazing earwig facts!

Did you know? Female earwigs are among the most devoted insect mothers on Earth — guarding their eggs continuously for weeks, turning them regularly to prevent fungal growth and licking them clean daily. If the eggs are moved away, she will search for and retrieve them one by one!

👂 The Ear Myth — Completely False

The earwig's name — derived from the Old English "ēare wicga" meaning "ear creature" — reflects an ancient and entirely unfounded belief that earwigs deliberately crawl into the ears of sleeping humans to lay eggs in the brain. This belief persisted in European folklore for centuries and remains widely held today despite being completely unsupported by any evidence. Earwigs occasionally enter warm, dark sheltered spaces — and a human ear canal while sleeping theoretically qualifies as such a space — but this is no more common or deliberate than any other small insect that might accidentally enter an ear. Earwigs have no interest in the human ear, no ability to lay eggs in a human brain and no behaviour pattern directed at human hosts of any kind.

✂️ The Forceps — Tool, Not Weapon

The most distinctive feature of the earwig is the pair of curved forceps-like appendages at the tip of its abdomen — called cerci — which give the insect its threatening appearance and contribute to its fearsome reputation. In reality, these forceps are used for multiple non-aggressive purposes: folding and manipulating the earwig's remarkably complex hindwings, gripping prey during feeding, handling food and serving as defensive tools when the insect is threatened. Male earwigs typically have more curved, asymmetric forceps than females, and the forceps' shape and size vary considerably between species. While an earwig can use its forceps to pinch a finger hard enough to cause mild discomfort, they are not capable of breaking skin in most species and present no genuine danger to humans.

🪁 Remarkably Folded Wings

Beneath the earwig's short, leathery forewings lie hindwings of extraordinary complexity — large, fan-shaped flying wings that fold into an area approximately one-fifteenth of their unfolded size through a remarkably intricate origami-like folding mechanism. This extraordinary wing-folding system — which has attracted significant scientific study for its potential applications in engineering of deployable structures — allows the earwig to store fully functional large wings in a space barely visible beneath the shortened forewings. Despite possessing these functional flight wings, most earwig species fly rarely or not at all, preferring to walk and hide. The wing-folding mechanism is so complex and effective that engineers are studying it for applications in satellite solar panels and other deployable structures requiring maximum surface area in minimum storage space.

👶 Extraordinary Maternal Care

Female earwigs display one of the most remarkable examples of maternal care found in any insect species. After laying a clutch of 20 to 80 eggs in a burrow, the female guards them continuously — remaining with the eggs through the entire incubation period of several weeks, rarely leaving even briefly to feed. During this period she turns the eggs regularly to ensure even development and prevent suffocation, and licks them daily to remove fungal spores that would otherwise kill the developing embryos. If the eggs are experimentally moved away from the mother during this period, she will actively search for them and carry them back one by one to her nest — a retrieval and relocation behaviour that demonstrates a level of active maternal investment virtually unparalleled among insects outside the social species like ants and bees.

🍽️ Opportunistic Garden Omnivores

Earwigs are omnivorous and opportunistic feeders, consuming a wide range of materials including decaying plant matter, live plant material, insects, insect eggs, aphids and other small invertebrates. This omnivorous diet makes earwigs genuinely ambiguous in terms of their effect on garden ecosystems — in high numbers they can damage seedlings, flower petals and soft fruit, causing genuine economic loss in vegetable gardens and orchards, while simultaneously consuming significant quantities of aphids and other pest insects, providing genuine pest control services. Whether earwigs are net beneficial or detrimental in a particular garden depends heavily on local conditions and what other insects are present.

🌍 Over 2,000 Species Worldwide

There are over 2,000 known earwig species distributed across every continent except Antarctica, found in habitats ranging from tropical rainforests to temperate gardens to desert environments. They are predominantly nocturnal, spending daylight hours hidden in narrow crevices, under bark, stones or in soil, emerging after dark to forage. Most species live on the ground or in low vegetation, though some tropical species are adapted for tree-climbing and spend their entire lives in the canopy.

Amazing final fact: The wing-folding mechanism of earwig hindwings achieves a folding ratio — the ratio of unfolded wing area to folded package size — that is 10 times more efficient than any human-engineered deployable structure currently in use. Researchers at the University of Tokyo and other institutions are actively studying earwig wing-folding as a template for engineering foldable structures including space satellite solar arrays, medical devices that must be inserted small and expanded large, and compact deployable shelters — suggesting the humble garden earwig may contribute to the future of space engineering.

Devoted mothers, origami-wing engineers and entirely innocent of the ear-crawling myth, the earwig is a far more fascinating and far less threatening garden insect than its ancient reputation suggests. 🦗

All content written originally by Geeta Singh. 

Sources & Further Reading: Information researched from Wikipedia (en.wikipedia.org), Royal Entomological Society, Nature Engineering.