Southern Utah pest library
Arizona Bark Scorpion Identification
The Arizona bark scorpion (Centruroides sculpturatus) is the only scorpion in the United States whose sting is considered medically significant, and it’s the one species you actually need to know about if you live in Washington County. Adults are small, pale, and active on warm nights from spring through fall. Bark scorpions are exceptional climbers, often turning up on walls and ceilings rather than just the floor. If you’re seeing them indoors, especially with kids or pets in the home, it’s time to call a pro.
Adult Arizona bark scorpions are slender, light yellow to yellowish-tan, and run about 2 to 3 inches long from claws to stinger. They have notably thin pincers and a long, narrow tail, a delicate-looking build compared to the chunkier scorpions you’ll see in the desert. Like nearly all scorpions, they fluoresce a bright bluish-green under UV blacklight, which is the easiest way to spot them after dark. The most common look-alike in our area is the desert hairy scorpion (Hadrurus arizonensis), but it’s much larger, visibly hairy, and has thick, robust pincers. One detail that matters a lot: bark scorpions readily climb walls, stucco, and ceilings, and often rest hanging upside down. Most other scorpions in our region stay on the ground.
Quick ID
Spotting a Bark Scorpion in Utah: Quick ID
Four checks tell you whether the scorpion on your wall is the one that matters.
Size
2 to 3 inches
Measured from claws to stinger, with a slender, delicate build.
Color
Pale straw to light tan
Thin pincers and a long, narrow tail. Glows blue-green under a blacklight.
Where in Southern Utah
Washington County
Block walls, rock beds, woodpiles and garages, and they climb stucco and ceilings.
Danger level
Medically significant sting
The one scorpion in the U.S. whose sting needs real caution, especially with children.
High Risk
Book a Blacklight Scorpion Inspection
Scorpions glow under UV light. We walk your property at night with a blacklight so you know exactly what you are dealing with, then treat the hiding spots.
Where Bark Scorpions Live in Southern Utah
In Utah, bark scorpions are restricted to the warm Mojave Desert ecotype in the far southwest corner of the state (Washington County and a sliver of Kane County), and they are not found in northern Utah. Around St. George, Hurricane, Bloomington, Dixie Downs, and the red rock terrain near Sand Hollow, they hide in rocky outcrops, under loose bark, in woodpiles, inside block walls, and in irrigation boxes. They’ll also tuck into shoes, gloves, or laundry left on the patio overnight. Their favorite outdoor harborage is anywhere cool, dark, and slightly humid during the day so they can emerge to hunt at night.
Why They Get Into Homes
Three things pull bark scorpions toward your house, and Southern Utah summers crank all three to maximum. First is water: once daytime temperatures climb above 100°F, scorpions seek any moisture they can find, including bathrooms, leaky hose bibs, and pet water bowls. Second is prey: bark scorpions eat crickets, roaches, spiders, and other soft-bodied insects, so an interior bug problem is what’s actually feeding a scorpion problem. Third is harborage: cool, dark wall voids, garages, and crawl spaces stay much cooler than sun-exposed patios and rocks during the day. Active construction nearby can also disturb native habitat and push displaced scorpions into existing homes.
Signs You Have Bark Scorpions
Because bark scorpions are nocturnal and small, most homeowners don’t realize they have them until something specific tips them off. Watch for these:
- A live scorpion stuck in your bathtub, shower, or sink; they fall in chasing moisture and can’t climb back out of smooth, glazed surfaces
- Scorpions on walls or ceilings, often hanging upside down
- Pale, translucent shed exoskeletons in garages, sheds, or along baseboards
- One found in a shoe, boot, or pile of folded laundry
- Bluish-green glowing dots when you sweep a UV blacklight across the yard or foundation at night
- An active cricket or roach population indoors, their food source
- Sightings increasing after monsoon storms or new construction nearby
Even one confirmed indoor sighting in a home with small children warrants immediate action: bark scorpions can aggregate in groups, especially in cooler months, so where there’s one, there are often more nearby.
Bark Scorpion Sting Health Risks: Honest Assessment
The Arizona bark scorpion is the only scorpion in the U.S. whose sting is considered medically significant. A sting causes intense localized pain, numbness, and tingling that can radiate across the body and last for hours to a few days. Most healthy adults recover at home with ice and over-the-counter pain medication. Children are at the highest risk for severe symptoms, including rapid jittery eye movements, excessive salivation, muscle twitching, and respiratory difficulty, and need emergency care. Adults with underlying medical conditions or known allergies should also be evaluated promptly. The good news: an effective antivenom (Anascorp) was FDA-approved in 2011 and is stocked at hospitals serving regions where bark scorpions occur. Deaths in the U.S. are extremely rare. Pets are usually fine, but call your vet if a small dog or cat shows distress.
Found one inside?
Don’t reach for it barehanded. Trap it under a jar, then call us. We treat the hiding spots, not just the scorpion you saw.
DIY or a pro
How to Get Rid of Scorpions
What a homeowner can do this week, and the point where a professional plan makes more sense.
What you can do yourself
- Walk the yard and block walls after dark with a UV blacklight and remove any scorpions with long tongs.
- Set sticky traps along garage and bathroom baseboards to see where they travel.
- Cut off their food: deal with crickets and roaches indoors and out.
- Seal gaps, add door sweeps and fix the leaks that draw them in for water.
- Skip foggers and store sprays; they rarely reach a scorpion hiding in a wall void.
When to Call a Professional for Bark Scorpion Control
You should call a pro if you’ve had repeated indoor sightings, anyone in the home has been stung, you have small children or pets, your property backs up to red rock or undeveloped desert, or there’s active construction nearby. Bark scorpions are notoriously difficult to control with DIY products because of their climbing ability and how deep they hide. Green Defense uses targeted barrier treatments combined with cricket and insect control to remove their food source, a one-two approach that works far better than spraying alone. Request a free quote for Southern Utah scorpion control and we’ll walk your property at night with a blacklight so you know exactly what you’re dealing with.
Our scorpion exterminator in St. George service treats the foundation, block walls, garage and entry points on a regular schedule, so the barrier stays up all season.
How to Prevent Bark Scorpions Around Your Home
Prevention is mostly about denying them food, water, and entry points. The highest-impact steps:
- Seal cracks and gaps around your foundation, doors, windows, and where utilities enter the home; bark scorpions can squeeze through very small openings
- Install tight-fitting door sweeps on every exterior door, including the garage
- Move woodpiles, rock piles, and stacked construction materials at least 20 feet from the house
- Always shake out shoes, gloves, towels, and clothing left in the garage or outdoors before putting them on
- Switch exterior bulbs to yellow “bug” lights; they attract fewer insects, which removes a key food source
- Keep grass cut short, trim shrubs back from the foundation, and clear yard debris and leaf litter
- Fix leaky hose bibs, drip lines, and irrigation; eliminate standing water near the home
- Walk the property monthly with a UV blacklight after dark to spot activity early
One bonus: every step you take to control crickets, roaches, and spiders is also a step toward fewer scorpions, since you’re cutting off the buffet.
Ready for Fewer Scorpions This Season?
Most homes are on our bi-monthly plan, a visit every other month that keeps the barrier up from spring through fall. If scorpions come back between visits, so do we, free. We offer same-week service in most areas.
Questions
Arizona Bark Scorpion FAQ
Are bark scorpions found in northern Utah?
No. In Utah they live only in the warm southwest corner, mainly Washington County. Scorpions in northern Utah are other species.
What should I do after a scorpion sting?
Wash the area, apply a cool compress and call Poison Control at 1-800-222-1222. Take a child who was stung to the emergency room right away.
Why do I keep finding them in the bathtub?
They come in looking for water, fall into tubs and sinks, and can’t climb the smooth sides back out.
Do bark scorpions come back after treatment?
New ones can wander in from rock beds and open desert, which is why a regular barrier works better than a one-time spray.
Need them gone? See how our scorpion control in St. George works. If pests come back between visits, so do we, free. Live in Washington County? Learn about pest control in St. George.
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