Most scorpions in the Las Vegas Valley are harmless. One is not. Telling the Arizona bark scorpion apart from its bigger, less dangerous neighbors is worth a few minutes of your attention.
The Arizona bark scorpion is small and pale. Adults run about two to three inches including the tail, with a light tan or yellowish body that almost matches dry desert soil. The pincers are noticeably slender, not the chunky crab-like claws you see on bigger species, and the tail is thin and often held curled to one side rather than straight up.
Compare that to the desert hairy scorpion, the other common scorpion here. It is much larger, up to five or six inches, darker, with a greenish or olive body, thick pincers, and short hairs on the tail. It looks scarier and it is the one most people fear, but its sting is roughly like a bee. The smaller, plainer-looking bark scorpion is the one that actually matters.
Every scorpion glows. Their exoskeleton contains a compound that fluoresces a vivid blue-green under ultraviolet light, and that is the single most useful trick for finding them. A cheap UV flashlight turns an invisible problem into an obvious one. Wait until full dark, kill the patio lights, and slowly sweep the beam across the foundation, block walls, weep screeds, and the gravel near the house.
What surprises people is how many light up on a bad night, and how high. Bark scorpions climb. You will see them on vertical block walls, around door frames, and sometimes near the roofline, where most other scorpions never go. We bring a blacklight on every scorpion control inspection for exactly this reason: it shows the real population instead of the one or two you happened to step on. Homes pressed against the desert in Summerlin near Red Rock light up the most.
Bark scorpions look for cool, tight, dark spaces, and they are flat enough to slip into a gap the width of a credit card. Outside, that means block walls, woodpiles, rock landscaping, irrigation boxes, and the gravel along the foundation. They follow the insects they hunt, so a yard full of crickets is a yard that feeds scorpions.
Inside, the climbing habit changes everything. Check these spots:
They walk in through gaps the builder left behind. The biggest one in valley homes is the weep screed, the slotted metal strip at the base of stucco that is supposed to let the wall drain. It also lets scorpions march straight up behind the stucco and into the structure. Garage door corners, the gap under the door, utility and plumbing penetrations, and unsealed thresholds all do the same job.
This is why a one-time spray rarely fixes a scorpion problem. The insecticide on a baseboard does nothing about the open weep screed or the garage gap that lets the next one in. Real scorpion work treats the food source, the insects they hunt, and seals those entry points so the population outside cannot keep walking inside. The how-to article on getting rid of them walks through the sealing in detail.
The Arizona bark scorpion is the only scorpion in North America whose sting is a genuine medical concern. For most healthy adults a sting is intensely painful but not dangerous. The risk rises sharply for young children, the elderly, and pets, where symptoms can spread beyond the sting site. We are a pest control company, not a medical provider, so this is the honest line: if a child or pet is stung, or symptoms move past the spot of the sting, get medical advice promptly.
That is the whole reason identification matters. If you can tell the small pale climber from the big harmless one, you know when to relax and when to keep kids and pets clear and book treatment. If you are not sure which you are looking at, assume bark scorpion and keep your distance. You can read more on sting risk and first aid in the related guide below, and the FAQ page covers what scorpion service includes.
A bark scorpion is small, about two to three inches, light tan to yellowish, with very slender pincers and a thin tail. The much larger, darker desert hairy scorpion is far less dangerous. Color and the slim build are your fastest clues. When unsure, treat any scorpion indoors as a bark scorpion and keep your distance.
Yes. Every scorpion species, including the bark scorpion, fluoresces a bright blue-green under UV light because of a compound in their exoskeleton. A blacklight at night is the single best way to find them on a wall or in the yard. We use one on a perimeter inspection so you can see how many are actually out there.
They squeeze into wall voids, under baseboards, behind furniture, inside shoes and laundry on the floor, and up near ceilings since they can climb vertical surfaces. Unlike most scorpions, bark scorpions climb, so checking high spots matters. They enter through weep screeds, garage gaps, and utility penetrations from outside.
The bark scorpion is the only scorpion in North America whose sting is a genuine medical concern, especially for young children, the elderly, and pets. Most healthy adults recover, but a sting can be very painful. If a child or pet is stung, or symptoms spread beyond the sting site, seek medical care. We are not a medical provider, so when in doubt, call one.
A first scorpion-specific visit usually runs $150 to $300, with recurring plans around $100 to $150 per quarter. It costs more than a general spray because it treats the insects scorpions hunt and seals the entry points, not just a baseboard. See our scorpion control page or the cost guide for the details.
We are a licensed, local crew, and a first scorpion visit usually runs $150 to $300. We treat the food source, seal the entry points, and bring a blacklight so you can see the real population.
Last updated: May 28, 2026.
