What kind of scorpions live in Arizona?

Arizona is home to approximately 45 scorpion species, but five are most commonly encountered by homeowners: the Arizona bark scorpion (Centruroides sculpturatus), the giant desert hairy scorpion (Hadrurus arizonensis), the striped tail scorpion (Vaejovis spinigerus), the yellow ground scorpion (Vaejovis confusus), and the Arizona stripetail scorpion. Of these, only the bark scorpion is considered medically significant — its venom can cause severe neurological symptoms and is potentially life-threatening to children, the elderly, and immunocompromised individuals.

How dangerous is a scorpion sting in Arizona?

The vast majority of scorpion stings in Arizona are from non-bark-scorpion species and cause only localized pain, swelling, and temporary numbness — similar to a bee sting. However, a bark scorpion sting is a medical emergency, especially for children under 6, adults over 65, and anyone with a compromised immune system. Symptoms include intense burning pain, numbness and tingling that spreads from the sting site, muscle twitching, difficulty swallowing, blurred vision, and in severe cases, respiratory distress. Call Poison Control (1-800-222-1222) immediately after any suspected bark scorpion sting.

When are scorpions most active in Arizona?

Scorpions in Arizona are most active from April through October, with peak activity during the summer monsoon season (July–September). They are nocturnal — they hunt at night and hide during the day. Activity spikes on warm nights above 70°F, especially after rain events. In the Phoenix metro and Pinal County, scorpions can remain active year-round during mild winters, though they slow significantly below 50°F. The most dangerous months for scorpion encounters inside the home are June, July, and August.

Where do scorpions hide in your house?

Scorpions are expert hiders and can compress their bodies to fit through gaps as small as 1/16 inch. Inside the home, they are most commonly found in shoes and boots, folded towels and clothing, under beds and furniture, inside closets and cabinets, in bathrooms near plumbing, in garages and storage areas, and behind baseboards and wall voids. Outside, they hide under rocks, bark, wood piles, cardboard, and debris. Bark scorpions are unique among Arizona scorpions in that they can climb — they are often found on walls, ceilings, and in attic spaces.

How do I get rid of scorpions in my Arizona home?

Effective scorpion control requires a multi-layered approach: (1) Seal all entry points — caulk cracks in the foundation, around windows, doors, and utility penetrations; install door sweeps on all exterior doors. (2) Eliminate harborage — remove wood piles, debris, and clutter from around the home; keep mulch 6 inches from the foundation. (3) Control their food source — scorpions eat crickets, cockroaches, and other insects; a professional perimeter treatment that reduces insect populations will reduce scorpion activity. (4) Apply a professional-grade residual insecticide — consumer sprays have limited effectiveness on scorpions; licensed technicians use products and application methods that are significantly more effective. (5) Maintain quarterly treatments — scorpion pressure in Arizona requires ongoing professional treatment, not a one-time application.

Can scorpions climb walls and get into beds?

Yes — the Arizona bark scorpion is an exceptional climber and can scale smooth vertical surfaces including stucco, drywall, glass, and tile. They regularly climb walls and ceilings and can fall onto beds, furniture, and people below. This is why bark scorpions are found on ceilings and in attic spaces. To protect your bed, move it away from walls, remove bed skirts that touch the floor, and place the legs of the bed frame in glass jars or smooth plastic containers that scorpions cannot climb. Inspect bedding before getting in, especially during summer months.

Do scorpions glow under UV light?

Yes. All scorpion species fluoresce bright blue-green under ultraviolet (UV) or blacklight. This is caused by a substance in the hyaline layer of their exoskeleton that absorbs UV light and re-emits it as visible fluorescence. The biological reason for this fluorescence is still debated among researchers. Practically, it makes UV blacklight flashlights an extremely effective tool for finding scorpions at night — a scorpion that is nearly invisible to the naked eye becomes a glowing target under UV light. A quality UV flashlight (365–395nm wavelength) is one of the most useful tools for Arizona homeowners dealing with scorpion infestations.

How much does professional scorpion control cost in Arizona?

Professional scorpion control in Arizona typically costs $100–$200 for an initial treatment and $75–$150 per quarterly maintenance visit. Prices vary based on the size of the property, the severity of the infestation, and the treatment method used. Some companies offer annual contracts with monthly or bi-monthly service for high-pressure properties. The cost of professional treatment is almost always less than the medical bills from a bark scorpion sting — emergency room visits for severe envenomation can cost thousands of dollars. Pest Control Bros offers free inspections with no contracts required.

What kind of scorpions live in Arizona?

Arizona is home to approximately 45 scorpion species, but five are most commonly encountered by homeowners: the Arizona bark scorpion (Centruroides sculpturatus), the giant desert hairy scorpion (Hadrurus arizonensis), the striped tail scorpion (Vaejovis spinigerus), the yellow ground scorpion (Vaejovis confusus), and the Arizona stripetail scorpion. Of these, only the bark scorpion is considered medically significant — its venom can cause severe neurological symptoms and is potentially life-threatening to children, the elderly, and immunocompromised individuals.

How dangerous is a scorpion sting in Arizona?

The vast majority of scorpion stings in Arizona are from non-bark-scorpion species and cause only localized pain, swelling, and temporary numbness — similar to a bee sting. However, a bark scorpion sting is a medical emergency, especially for children under 6, adults over 65, and anyone with a compromised immune system. Symptoms include intense burning pain, numbness and tingling that spreads from the sting site, muscle twitching, difficulty swallowing, blurred vision, and in severe cases, respiratory distress. Call Poison Control (1-800-222-1222) immediately after any suspected bark scorpion sting.

When are scorpions most active in Arizona?

Scorpions in Arizona are most active from April through October, with peak activity during the summer monsoon season (July–September). They are nocturnal — they hunt at night and hide during the day. Activity spikes on warm nights above 70°F, especially after rain events. In the Phoenix metro and Pinal County, scorpions can remain active year-round during mild winters, though they slow significantly below 50°F. The most dangerous months for scorpion encounters inside the home are June, July, and August.

Where do scorpions hide in your house?

Scorpions are expert hiders and can compress their bodies to fit through gaps as small as 1/16 inch. Inside the home, they are most commonly found in shoes and boots, folded towels and clothing, under beds and furniture, inside closets and cabinets, in bathrooms near plumbing, in garages and storage areas, and behind baseboards and wall voids. Outside, they hide under rocks, bark, wood piles, cardboard, and debris. Bark scorpions are unique among Arizona scorpions in that they can climb — they are often found on walls, ceilings, and in attic spaces.

How do I get rid of scorpions in my Arizona home?

Effective scorpion control requires a multi-layered approach: (1) Seal all entry points — caulk cracks in the foundation, around windows, doors, and utility penetrations; install door sweeps on all exterior doors. (2) Eliminate harborage — remove wood piles, debris, and clutter from around the home; keep mulch 6 inches from the foundation. (3) Control their food source — scorpions eat crickets, cockroaches, and other insects; a professional perimeter treatment that reduces insect populations will reduce scorpion activity. (4) Apply a professional-grade residual insecticide — consumer sprays have limited effectiveness on scorpions; licensed technicians use products and application methods that are significantly more effective. (5) Maintain quarterly treatments — scorpion pressure in Arizona requires ongoing professional treatment, not a one-time application.

Can scorpions climb walls and get into beds?

Yes — the Arizona bark scorpion is an exceptional climber and can scale smooth vertical surfaces including stucco, drywall, glass, and tile. They regularly climb walls and ceilings and can fall onto beds, furniture, and people below. This is why bark scorpions are found on ceilings and in attic spaces. To protect your bed, move it away from walls, remove bed skirts that touch the floor, and place the legs of the bed frame in glass jars or smooth plastic containers that scorpions cannot climb. Inspect bedding before getting in, especially during summer months.

Do scorpions glow under UV light?

Yes. All scorpion species fluoresce bright blue-green under ultraviolet (UV) or blacklight. This is caused by a substance in the hyaline layer of their exoskeleton that absorbs UV light and re-emits it as visible fluorescence. The biological reason for this fluorescence is still debated among researchers. Practically, it makes UV blacklight flashlights an extremely effective tool for finding scorpions at night — a scorpion that is nearly invisible to the naked eye becomes a glowing target under UV light. A quality UV flashlight (365–395nm wavelength) is one of the most useful tools for Arizona homeowners dealing with scorpion infestations.

How much does professional scorpion control cost in Arizona?

Professional scorpion control in Arizona typically costs $100–$200 for an initial treatment and $75–$150 per quarterly maintenance visit. Prices vary based on the size of the property, the severity of the infestation, and the treatment method used. Some companies offer annual contracts with monthly or bi-monthly service for high-pressure properties. The cost of professional treatment is almost always less than the medical bills from a bark scorpion sting — emergency room visits for severe envenomation can cost thousands of dollars. Pest Control Bros offers free inspections with no contracts required.

Scorpions in Arizona: The Complete 2026 Homeowner Guide

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Arizona is home to approximately 45 scorpion species — more than almost any other state in the country. For the 5 million people living in the Phoenix metro and surrounding areas, scorpions are not a rare curiosity. They are a year-round reality that requires real knowledge and a real plan.

This guide covers everything you need to know: the species you will actually encounter, where they hide, when they are most dangerous, what to do if you are stung, and the proven strategies that licensed pest control professionals use to protect Arizona homes.

Whether you have found your first scorpion or you are dealing with a serious infestation, this is the most complete scorpion resource available for Arizona homeowners — updated for 2026 with current treatment protocols and prevention standards.

Bark Scorpion Sting — Call Poison Control Immediately

If you or someone in your household is stung by a bark scorpion, call Poison Control: 1-800-222-1222 right away. Do not wait for symptoms to develop. Children under 6, adults over 65, and immunocompromised individuals should go to the emergency room immediately.

Symptoms: intense burning pain, numbness/tingling spreading from sting site, muscle twitching, difficulty swallowing, blurred vision.

5 Scorpion Species Found in Arizona Homes

Of Arizona's 45 scorpion species, these five are the ones homeowners in Maricopa and Pinal County actually encounter. Only one is medically significant.

Scorpion species identification comparison in Arizona desert

Species	Size	Color	Venom	Climbs?	Danger
Arizona Bark ScorpionCentruroides sculpturatus	2–3 inches	Tan / light brown	Medically significant	Yes — walls, ceilings	HIGH
Giant Desert Hairy ScorpionHadrurus arizonensis	4–6 inches	Yellow-brown with dark back	Mild (bee-sting level)	No	LOW
Striped Tail ScorpionVaejovis spinigerus	2–2.5 inches	Yellow-brown with striped tail	Mild to moderate	Rarely	LOW
Yellow Ground ScorpionVaejovis confusus	1.5–2 inches	Pale yellow	Mild	No	LOW
Arizona Cave ScorpionPseudouroctonus apacheanus	1.5–2 inches	Dark brown to black	Mild	Rarely	LOW

Why the Bark Scorpion Is Different

The Arizona bark scorpion (Centruroides sculpturatus) is the only scorpion in the United States whose venom is considered medically significant. It is also the most common scorpion found inside Arizona homes — and the only one that can climb smooth vertical surfaces.

Only US scorpion with medically dangerous venom

Can climb walls, ceilings, and smooth surfaces

Extremely thin body — fits through 1/16" gaps

Colonies of up to 30 individuals in one location

Glows bright blue-green under UV blacklight

Active year-round in Phoenix metro mild winters

Read the complete bark scorpion guide →

Scorpion Activity Calendar: Month-by-Month in Arizona

Scorpions are nocturnal and ectothermic — their activity is directly tied to temperature. In Arizona, they are active nearly year-round, with a dramatic spike during monsoon season.

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

DormantLow activityActiveHigh activityPeak — most dangerous

Where Scorpions Hide in Your Home

Scorpions can compress their bodies to fit through gaps as small as 1/16 inch — roughly the thickness of a credit card. They seek dark, cool, undisturbed spaces during the day and emerge at night to hunt.

Scorpion hiding inside home in dark corner near shoes

Bedroom

Inside shoes and boots
Folded clothing on the floor
Under the bed frame
Inside pillowcases and bedding
Behind headboards against the wall

Bathroom

Under the sink cabinet
Inside towels hanging low
Behind the toilet
In the gap between tub and wall
Inside bath mats

Kitchen

Under the refrigerator
Inside cabinet toe kicks
Behind the stove
In the gap under the dishwasher
Inside grocery bags brought in from outside

Garage

Inside cardboard boxes
Under stored wood or lumber
In wall voids and insulation
Inside gloves and work boots
Behind shelving units

Outdoors

Under bark and wood piles
Beneath landscape rocks and pavers
Inside block wall cavities
In citrus and palm trees
Under leaf litter and mulch

Scorpion Sting: Symptoms, Severity & First Aid

Scorpion sting first aid treatment and medical response

Not all scorpion stings are equal. The vast majority of stings in Arizona — from striped tail, giant desert hairy, and yellow ground scorpions — cause localized pain and swelling comparable to a bee sting. They are painful but not dangerous to healthy adults. A bark scorpion sting is a different situation entirely.

Non-Bark Scorpion Sting

Immediate sharp pain at sting site
Localized swelling and redness
Numbness or tingling near the sting
Symptoms resolve within 1–2 hours
No systemic effects in healthy adults
Treat with ice, OTC pain reliever

Bark Scorpion Sting — Medical Emergency

Intense burning pain that spreads rapidly
Numbness and tingling beyond the sting site
Uncontrolled muscle twitching or spasms
Difficulty swallowing or breathing
Blurred vision or roving eye movements
Drooling, sweating, elevated heart rate

Bark Scorpion Sting: 6-Step First Aid Protocol

1Call Poison Control immediately: 1-800-222-1222. Do not wait for symptoms.
2Stay calm and keep the affected limb still and at or below heart level.
3Apply a cool compress (not ice directly on skin) to the sting site.
4Do NOT apply a tourniquet, cut the sting site, or try to suck out venom.
5Take an OTC antihistamine (Benadryl) if available — may reduce mild symptoms.
6Go to the ER immediately if the patient is a child under 6, over 65, or symptoms are spreading.

Arizona Poison & Drug Information Center: 1-800-222-1222 (24/7)

UV Blacklight Detection: The Most Effective DIY Tool

Scorpion glowing bright blue-green under UV blacklight at night

All scorpion species fluoresce bright blue-green under ultraviolet (UV) light. This is caused by a compound in the hyaline layer of their exoskeleton that absorbs UV and re-emits it as visible light. A scorpion that is nearly invisible to the naked eye in the dark becomes a glowing target under a UV flashlight.

For Arizona homeowners, a quality UV blacklight flashlight (365–395nm wavelength) is one of the most valuable tools available. Walk your property at night — inside and outside — and you will quickly learn exactly where scorpions are active, which entry points they are using, and how severe your infestation is.

365–395nm

Best wavelength

Produces the brightest fluorescence

10 PM – 2 AM

Best time to hunt

Peak scorpion activity window

10–15 feet

Detection range

Quality UV flashlight in darkness

Scorpion Prevention: The Complete Homeowner Checklist

Pest control professional sealing home foundation to prevent scorpion entry

Seal Entry Points

Caulk all cracks in the foundation and exterior walls
Install door sweeps on every exterior door
Seal gaps around plumbing and electrical penetrations
Repair torn window and door screens
Seal the gap under garage doors with a rubber seal
Fill gaps around AC line sets and utility conduits

Eliminate Harborage

Move firewood at least 20 feet from the house
Remove landscape rocks and debris near the foundation
Keep mulch 6+ inches away from the structure
Trim tree branches that touch the roof or walls
Remove cardboard boxes from garages and storage areas
Clear leaf litter and dead vegetation regularly

Reduce Food Sources

Maintain a professional perimeter insecticide treatment
Eliminate standing water and moisture sources
Fix leaky outdoor faucets and irrigation heads
Keep outdoor lights off or use yellow bug lights
Seal cracks where crickets and cockroaches enter
Treat for crickets — scorpions follow their food

Inside the Home

Shake out shoes and boots before putting them on
Check folded towels and clothing before use
Move beds away from walls; remove bed skirts
Place bed frame legs in smooth glass jars
Inspect bedding before getting in at night
Use a UV blacklight to sweep rooms at night

Professional Scorpion Treatment: What Actually Works

Consumer sprays have limited effectiveness against scorpions. Scorpions have a thick, waxy exoskeleton that resists many contact insecticides, and they spend most of their time in harborage areas that consumer products cannot reach. Professional-grade treatment is significantly more effective for three reasons:

Professional-Grade Products

Licensed technicians use residual insecticides with active ingredients and concentrations not available to consumers — including bifenthrin, cyfluthrin, and deltamethrin formulations specifically effective against scorpions.

Targeted Application

Professionals treat harborage areas, entry points, and the perimeter with precision. They know where scorpions hide and apply product where it will intercept scorpions, not just on visible surfaces.

Integrated Approach

Effective scorpion control also eliminates the insects scorpions eat. A professional treatment that reduces cricket and cockroach populations removes the food source that sustains scorpion colonies.

Treatment Method	Best For	Frequency	Effectiveness
Perimeter residual spray	Ongoing prevention	Quarterly	High
Interior crack & crevice	Active infestation inside	As needed	High
Exclusion sealing	Entry point elimination	One-time + annual check	Very High
Harborage reduction	Outdoor colony disruption	Ongoing	High
Consumer spray (DIY)	Spot treatment only	As needed	Low

Go Deeper: Scorpion Guides for Arizona Homeowners

Bark Scorpions in Phoenix: Complete Guide Bark Scorpion Sting: Symptoms & First Aid 7 Entry Points Scorpions Use to Get Inside Room-by-Room Scorpion-Proofing Checklist UV Blacklight Scorpion Hunting Guide Bark Scorpion Season: When Are They Active?Bark Scorpion Venom: 10 Facts Explained Bark Scorpions and Kids: What Parents Must Know Professional Control vs. DIY: Honest Comparison Giant Desert Hairy Scorpion: Facts & Safety

Scorpion Problem in Your Arizona Home?

Pest Control Bros LLC serves Maricopa, Pinal County, and the greater Phoenix metro. Free inspections. No contracts. Same-week service.

Book a Free Inspection (520) 424-5244

Scorpions in Arizona: The Complete 2026 Homeowner Guide