The European earwig (Forficula auricularia) is the most widespread and commonly encountered earwig species in North America and Arizona. Originally from Europe, it has established itself across the continent and thrives in Arizona's irrigated urban and suburban landscapes. Adults are 5/8–3/4 inch long, reddish-brown to dark brown, with a flattened body and the characteristic pair of curved forceps (cerci) at the tail end — the feature that gives earwigs their name and inspires the myth that they crawl into human ears (they do not). Males have strongly curved forceps; females have straighter ones. European earwigs are omnivorous nocturnal scavengers that feed on decaying organic matter, live and dead insects, and plant material including flowers, soft fruits, and vegetable seedlings. During the day they hide in dark, moist crevices — under mulch, bark, stones, potted plants, and garden debris. They enter homes through gaps around doors, windows, and utility penetrations, particularly during hot, dry Arizona summers when they seek moisture. Indoors they are found in bathrooms, kitchens, laundry rooms, and basements. While alarming in appearance, European earwigs are not venomous, do not bite humans, and are not structurally damaging. They can cause significant damage to garden plants and are a nuisance pest when populations build up.
👁Warning Signs
Reddish-brown insects with prominent rear pincers found in moist areas indoors. Irregular holes and ragged edges on flower petals, soft fruits, and vegetable seedlings. Large numbers under mulch, potted plants, or garden debris. Nocturnal activity — most visible at night.
⚠Health & Property Risks
Garden plant damage — flowers, seedlings, and soft fruits. Nuisance invasion of homes in large numbers. Alarming appearance but not venomous or structurally damaging. The ear-crawling myth is false.
Prevention Tips
Eliminate moisture and harborage: reduce mulch depth near foundation, remove leaf litter and debris, fix leaky irrigation. Seal gaps around doors, windows, and utility penetrations. Use yellow or sodium vapor outdoor lighting — less attractive to earwigs than white lights.
🛡Professional Treatment
Perimeter insecticide treatment (pyrethroid) around foundation and entry points. Bait products (spinosad-based) placed in garden beds. Diatomaceous earth in garden borders. Sticky traps to monitor populations.
Frequently Asked Questions — European Earwig
The European Earwig (Forficula auricularia) is reddish-brown to dark brown; prominent curved rear forceps; males have strongly curved pincers and typically measures 5/8–3/4 inch. The European earwig (Forficula auricularia) is the most widespread and commonly encountered earwig species in North America and Arizona. Originally from Europe, it has established itself across the co.
The European Earwig is generally low-risk, but caution is still advised. Garden plant damage — flowers, seedlings, and soft fruits. Nuisance invasion of homes in large numbers. Alarming appearance but not venomous or structurally damaging. The ear-crawling myth is false.
In Arizona, european earwigs are most often encountered in the following situations: Reddish-brown insects with prominent rear pincers found in moist areas indoors. Irregular holes and ragged edges on flower petals, soft fruits, and vegetable seedlings. Large numbers under mulch, potted plants, or garden debris. Nocturnal activity — most visible at night.
The European Earwig is most active during: Year-round in Arizona; most active and invasive spring through fall; overwinter as eggs. Arizona's warm desert climate can extend activity periods compared to other states, so year-round vigilance is recommended in the Phoenix metro and surrounding areas.
Eliminate moisture and harborage: reduce mulch depth near foundation, remove leaf litter and debris, fix leaky irrigation. Seal gaps around doors, windows, and utility penetrations. Use yellow or sodium vapor outdoor lighting — less attractive to earwigs than white lights.
Perimeter insecticide treatment (pyrethroid) around foundation and entry points. Bait products (spinosad-based) placed in garden beds. Diatomaceous earth in garden borders. Sticky traps to monitor populations.
Yes — earwigs can use their rear pincers (cerci) defensively if handled, but the pinch is generally harmless to adults and rarely breaks skin. They do not sting, are not venomous, and pose no significant medical risk. Their alarming appearance is far worse than their actual threat.
Dealing with European Earwig?
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