European Earwig vs. Striped Earwig

🐛 European vs. Striped Earwig

Forficula auricularia / Labidura riparia · Dermaptera: Forficulidae

Two earwig species commonly invade structures. The European earwig (introduced, northern US) and the striped earwig (native, southern US) look similar but have regional ranges.

EarwigDermapteraOccasional InvaderRegionalMoistureNuisance

📐 FIELD GUIDE ILLUSTRATION

European earwig (Forficula auricularia) identification illustration with labeled anatomical features — PestControlBasics.com

Original illustration by PestControlBasics.com. Use anatomical labels above to confirm your identification.

🔬

PestControlBasics Editorial Team

Reviewed by Derek Giordano · Updated 2026

🔍 Identification

European Earwig (F. auricularia): 12-15mm; dark brown; prominent curved male forceps / straighter female forceps; pale legs. Widespread throughout US, dominant in North.

Striped Earwig (L. riparia): Larger (20-30mm); light brown with two dark stripes on thorax; very long forceps; coastal and southern states. Distinguished by size and stripes.

🧬 Biology & Behavior

Both species: primarily nocturnal scavengers and predators. Shelter in moist protected areas during the day — under mulch, rocks, bark, and debris. Feed on decaying organic matter, aphids, small insects, and occasionally plant material. Attracted to indoor moisture and warmth.

⚠️ Damage & Health Risk

Nuisance entry into structures; occasional minor plant damage in gardens (seedlings most vulnerable). No biting risk. No disease transmission. No structural damage.

🔧 DIY Treatment

Remove harborage from foundation contact (mulch, leaf debris). Fix moisture issues. Apply bifenthrin perimeter spray. Newspaper roll traps in garden. Seal door gaps.

👷 When to Call a Pro

Rarely warranted for earwigs alone.

❓ FAQ

Are earwig forceps dangerous?

Earwig forceps (cerci) are used in mating and self-defense. They can pinch skin if the earwig is pressed against it, but cannot break skin and have no venom. The pinch is startling but completely harmless.

Do earwigs live in large groups?

Earwigs are gregarious and often found in loose groups under shelter objects — this is why you might find dozens under a rock or board. They're not colonial like ants or bees; the grouping is coincidental shelter-seeking.

Factor	Details
U.S. Range	All or most U.S. states
Regional Detail	Distribution varies — consult your local extension service for regional prevalence data.

Factor

Details

U.S. Range

All or most U.S. states

Regional Detail

Distribution varies — consult your local extension service for regional prevalence data.

📅 Treatment Timing Guide

Treating at the right time dramatically improves results. Pest control timed to the life cycle uses less product and achieves better long-term control.

Period	Action
Spring	Inspection and perimeter treatment before pest season starts.
Summer	Active monitoring and targeted treatments as needed.
Fall	Preventive treatment before overwintering pests seek entry.

Period

Action

Spring

Inspection and perimeter treatment before pest season starts.

Summer

Active monitoring and targeted treatments as needed.

Fall

Preventive treatment before overwintering pests seek entry.

💰 Professional Treatment Costs

Service Type	DIY Cost	Professional Cost
Initial inspection	Free (self-inspect)	$75–$150 (often credited to treatment)
One-time treatment	$30–$100 in materials	$150–$500
Annual service contract	N/A	$400–$900/year
Severe infestation	Often ineffective alone	$500–$2,500+

Service Type

DIY Cost

Professional Cost

Initial inspection

Free (self-inspect)

$75–$150 (often credited to treatment)

One-time treatment

$30–$100 in materials

$150–$500

Annual service contract

N/A

$400–$900/year

Severe infestation

Often ineffective alone

$500–$2,500+

Prices vary by region, property size, and infestation severity.

❓ Common Questions About 🐛 European vs. Striped Earwig

How do I confirm I actually have this pest (not something similar)?

The most reliable confirmation is a physical specimen — capture one and compare to reference images on this page. For cryptic pests (bed bugs, termites), look for secondary signs: frass, shed skins, mud tubes, or bites with a specific pattern. When uncertain, a professional inspection is faster than months of misidentification.

Can I treat this myself or do I need a professional?

DIY is effective for small, accessible infestations caught early. Professionals are worth the cost when: the infestation is inside wall voids or structural elements, multiple rooms are affected, you have health-risk pests (hantavirus, venomous species), or DIY has already failed twice.

How long until the infestation is completely gone?

Expect 3–8 weeks for most infestations with proper treatment. Insects with dormant life stages (pupae, eggs) extend the timeline because those stages are impervious to most insecticides. Follow-up treatments at 2 and 4 weeks catch each new cohort as they emerge.

What's the most common mistake people make treating this pest?

Treating only the visible pest population while ignoring the harborage site, entry point, or breeding location. Killing adults provides temporary relief but the population rebuilds from hidden egg cases, pupae, or new arrivals through unaddressed entry points.