The brown earwig (Vostox brunneipennis) is a native North American earwig species found across the western and southwestern United States, including throughout Arizona. Adults are medium-sized (1/2–5/8 inch), uniformly brown to reddish-brown, with wings that are present but rarely used for flight. The forceps are moderately curved. Brown earwigs are primarily predatory, feeding on aphids, mites, small caterpillars, and other soft-bodied insects, making them beneficial in garden and agricultural settings. They are found in a variety of habitats across Arizona — from desert grasslands and riparian areas to irrigated gardens, orchards, and suburban landscapes. Like other earwigs, they are nocturnal and hide in dark, moist crevices during the day. They are less commonly encountered as household pests than the European earwig or ring-legged earwig, preferring outdoor habitats. In Arizona's agricultural areas, brown earwigs are considered beneficial predators and are sometimes encouraged in integrated pest management programs. They are most active during the warm months and may enter homes occasionally when populations are high or conditions are dry.
👁Warning Signs
Medium-sized uniformly brown earwigs found in garden beds, under mulch, or in outdoor debris. Primarily outdoor species — less commonly found indoors. Nocturnal; hides during the day.
⚠Health & Property Risks
Minimal pest concern — primarily a beneficial predator. Occasional nuisance if entering homes. Not venomous or structurally damaging.
Prevention Tips
Seal entry points if entering homes. Reduce harborage near foundation. Generally no prevention needed — a beneficial species.
🛡Professional Treatment
No treatment typically needed. If entering homes in large numbers, perimeter insecticide treatment at entry points.
Frequently Asked Questions — Brown Earwig
The Brown Earwig (Vostox brunneipennis) is uniformly brown to reddish-brown; moderately curved forceps; wings present but rarely used and typically measures 1/2–5/8 inch. The brown earwig (Vostox brunneipennis) is a native North American earwig species found across the western and southwestern United States, including throughout Arizona. Adults are medium-sized (1/2–5/.
The Brown Earwig is generally low-risk, but caution is still advised. Minimal pest concern — primarily a beneficial predator. Occasional nuisance if entering homes. Not venomous or structurally damaging.
In Arizona, brown earwigs are most often encountered in the following situations: Medium-sized uniformly brown earwigs found in garden beds, under mulch, or in outdoor debris. Primarily outdoor species — less commonly found indoors. Nocturnal; hides during the day.
The Brown Earwig is most active during: Most active spring through fall; may overwinter as adults in protected locations. 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.
Seal entry points if entering homes. Reduce harborage near foundation. Generally no prevention needed — a beneficial species.
No treatment typically needed. If entering homes in large numbers, perimeter insecticide treatment at entry points.
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 Brown Earwig?
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