Scorpions

Bark Scorpion Guide: Identification and Prevention for St. George Homes

By Vexa Pest and Home Services · Published · Updated · 4 min read

Bark scorpions get a lot of attention in Southern Utah, and for good reason: the Arizona bark scorpion (Centruroides sculpturatus) is found in parts of Washington County and is considered the most medically significant scorpion in North America. This guide covers how to recognize one, how to check your property with a blacklight, and how sealing your home reduces encounters.

If you want the broader picture of scorpions in our area, see our guide to scorpions in St. George. This article focuses on bark scorpions specifically.

How to identify a bark scorpion

Positive identification can be hard, especially at night, but bark scorpions share a few common traits:

  • Size: usually about 2 to 3 inches long as adults.
  • Color: light tan, straw, or yellowish-brown. Some individuals show darker striping.
  • Body shape: slender and narrow, with a thin, long tail.
  • Pincers: long and thin, not thick or crab-like.
  • Behavior: strong climbers. They are often found on walls, ceilings, and the undersides of objects, and may rest with the tail curled to the side.

Where bark scorpions hide around homes

Bark scorpions prefer cool, tight, sheltered spaces during the day and come out at night to hunt insects. Around homes, look in and near:

  • Block walls and rock landscaping, especially along the foundation
  • Stacked firewood, pavers, lumber, and stored items
  • Garages, especially along walls and behind boxes
  • Weep screeds, stucco cracks, and gaps near rooflines
  • Bathrooms, laundry rooms, and other areas near plumbing

Because they climb, bark scorpions can also enter higher up — through gaps around attic vents, eaves, or poorly sealed light fixtures — not just under doors.

How to do a blacklight inspection

Scorpions fluoresce a bright blue-green under ultraviolet light. A handheld UV flashlight makes them much easier to spot at night, and it's one of the best ways to understand how much scorpion activity is around your home.

  1. Wait until it's fully dark — about an hour or more after sunset is a good time.
  2. Wear closed-toe shoes and gloves, and bring a UV flashlight plus a regular flashlight.
  3. Walk slowly along the foundation, block walls, fences, and around doors and windows.
  4. Shine the light along walls and up toward eaves, since bark scorpions climb.
  5. Check the garage and the inside of the garage door seal.
  6. Note where you find them. Clusters near a door, crack, or wall often point to an entry point or hiding place to address.

Don't try to grab a scorpion you spot. The point of the check is to learn where activity is concentrated so you can seal, clean up, or call for help.

Sealing your home against bark scorpions

Bark scorpions can squeeze through very small gaps, so sealing is the most practical long-term step a homeowner can take.

Home-sealing checklist

  • Install or replace door sweeps so there's no visible light under exterior doors
  • Replace worn weatherstripping around doors and windows
  • Check the garage door bottom seal and side seals
  • Seal openings where pipes, wires, and hose bibs enter the home
  • Caulk cracks in stucco, foundation, and around window frames
  • Make sure window and vent screens fit tightly and aren't torn
  • Cover or screen weep holes and attic vents appropriately

More scorpion prevention tips for St. George homeowners

  • Move firewood, rocks, and stored items away from the foundation.
  • Reduce insect activity — fewer crickets and bugs means less food for scorpions.
  • Keep outdoor lights near doors low or motion-activated to draw fewer insects.
  • Pull beds slightly away from walls and keep bedding off the floor.
  • Shake out shoes, gloves, and towels left in garages or outdoors.

When to call a professional

If a blacklight check turns up regular activity, you're finding scorpions indoors, or you've sealed obvious gaps and still see them, a professional can help find entry points and recommend a plan. Vexa Pest and Home Services provides scorpion control in St. George, Washington, and nearby communities.

If someone is stung

This article isn't medical advice. Bark scorpion stings can be more serious for young children, older adults, and people with health conditions. Contact Poison Control at 1-800-222-1222 for guidance, and call 911 for severe symptoms such as trouble breathing or uncontrolled movements.

Want to go deeper? Browse the Southern Utah scorpion resource page, or learn about Vexa's scorpion control service.

Frequently asked questions

What does a bark scorpion look like?

Usually 2 to 3 inches long, light tan to yellowish-brown, with a slender body, thin pincers, and a long thin tail. They are strong climbers.

Are bark scorpions found in St. George, Utah?

Yes. The Arizona bark scorpion lives in parts of Southern Utah, including Washington County, though other scorpion species are found here too.

Do scorpions really glow under a blacklight?

Yes. Scorpions fluoresce blue-green under ultraviolet light, which makes a nighttime blacklight check an easy way to find them.

What's the best way to keep bark scorpions out of my house?

Seal the gaps they use: door sweeps, weatherstripping, garage door seals, cracks, and openings around pipes and vents. Reducing clutter and insects near the foundation helps too.

Seeing bark scorpions around your home?

Vexa Pest and Home Services can help find entry points around your St. George area home and recommend a practical scorpion-control plan.

Request Scorpion Help
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Vexa Pest and Home Services

Locally owned pest control in St. George and Washington, Utah, run by Mike Moore and Daylor Rymer. Meet the Vexa team.

Content review: every guide is reviewed and approved by the Vexa team before publishing. Last reviewed October 2, 2026.

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Mike Moore (left) and Daylor Rymer (right), owners of Vexa Pest Control, in front of the Vexa truck
Mike Moore (left) and Daylor Rymer (right) — owners
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