# UV Blacklight Scorpion Hunting: How Scottsdale Homeowners Can Find Scorpions at Night | Scorpion Control Scottsdale > Bark scorpions glow under UV light. Learn how to blacklight-hunt scorpions around your Scottsdale home, what your count means, and when it's time for professional scorpion control. Source: https://scorpioncontrolscottsdale.com/blog/uv-blacklight-scorpion-hunting-scottsdale --- Back to Blog Scorpion Prevention # UV Blacklight Scorpion Hunting: How Scottsdale Homeowners Can Find Scorpions at Night August 10, 2026 4 min read ![Homeowner using a UV blacklight flashlight to reveal a glowing bark scorpion on a block wall in a Scottsdale backyard at night](https://silent-marmot-488.convex.cloud/api/storage/6377cff3-3de0-4e68-ab95-1ddd8202ddac) If you've spotted one bark scorpion in your Scottsdale home, there's a good chance you have more. The problem is that scorpions are experts at staying hidden during the day — tucked into block walls, under bark chips, behind baseboards, and inside weep holes. The good news: bark scorpions have a biological quirk that makes them easy to find. Under ultraviolet light, they glow a bright blue-green, standing out against desert landscaping like tiny neon signs. A UV flashlight (blacklight) inspection is the single most useful thing a Scottsdale homeowner can do to understand the scale of a scorpion problem. Here's how to do it right, what the results actually tell you, and when it's time to bring in professional help. ## Why Scorpions Glow Under UV Light Bark scorpions have fluorescent compounds in the hyaline layer of their exoskeleton. When UV light in the 380–400 nanometer range hits that layer, it fluoresces — brightly. Even a scorpion partially hidden under a rock or wedged into a stucco crack will show a telltale glow. Freshly molted scorpions glow more faintly for a few days, but adults light up from 10 to 15 feet away with a decent flashlight. ## The Right Gear for a Scorpion Hunt - UV flashlight, 395nm or lower: Cheap keychain blacklights work poorly. Spend $15–30 on a flashlight with 21+ LEDs or a single high-output UV emitter. The 365nm models produce less visible purple light and make scorpions pop even more. - Closed-toe shoes: Never hunt scorpions in sandals. Bark scorpions sting when pressed, and you'll be walking through their territory in the dark. - Long tweezers or tongs: If you plan to remove scorpions, 12-inch tweezers keep your hands well clear. A glass jar works for containment. - A second person: One person holds the light, one handles removal. It's also simply safer at night. ## When and Where to Look Bark scorpions are nocturnal and most active on warm nights between 75°F and 95°F — which in Scottsdale means practically every night from April through October. The best hunting window is 8:30 to 11:00 PM, roughly an hour after full dark, when scorpions leave their daytime harborage to hunt crickets and roaches. ### Outdoor hotspots - Block walls: The number one scorpion habitat in Scottsdale, Paradise Valley, and Cave Creek. Walk your perimeter wall slowly and scan both faces plus the cap. Scorpions hide inside the hollow cells and emerge through cracks and weep holes. - Expansion joints and pavers: Scan the gaps in your pool deck and patio, especially travertine laid on sand. - Landscape rock and rip-rap: Anywhere with stacked rock or granite boulders near the foundation. - Citrus and palm trees: Bark scorpions climb. Check trunks, especially where fronds or bark create layered hiding spots. - Exterior walls of the house: Scan stucco up to roofline. Scorpions routinely climb walls and enter attics through gaps at the parapet or under tile. ### Indoor checkpoints - Garage perimeter, especially behind stored boxes on the floor - Bathroom and kitchen plumbing penetrations under sinks - Baseboards in rooms on the block-wall side of the house - Closets that share a wall with the garage ## How to Read Your Results What you find tells you how serious the problem is: - 0–2 scorpions on the property: Incidental pressure, likely wanderers from a neighbor's yard or nearby wash. Sealing entry points and reducing harborage is usually enough. - 3–10 scorpions, mostly on perimeter walls: An established outdoor population. This level calls for a treatment program that targets the wall voids and harborage areas, not just a basic spray. - 10+ scorpions, or any females with babies on their backs: A breeding population on your property. Bark scorpions give live birth to 25–35 young, and each of those can live six years. This will not resolve on its own. - Scorpions found indoors repeatedly: Your home has open entry points — and where one gets in, more follow. A bark scorpion can squeeze through a gap the thickness of a credit card. ## Removal: Do's and Don'ts - Do use long tweezers and drop scorpions into a jar of soapy water, or simply crush them with a shoe on a hard surface. - Don't step on a scorpion on gravel — the rock protects it, and it may sting through thin soles. - Don't spray a wall with store-bought insecticide and assume the job is done. Bark scorpions are remarkably resistant to over-the-counter products, and contact sprays don't reach the wall voids where they actually live. - Do keep a count and note locations. A map of two or three hunting nights is genuinely useful data for a professional treatment plan. ## Why Blacklight Hunting Alone Won't Solve It UV hunting removes the scorpions you can see on a given night — typically 20–30% of the population that's actually on your property. The rest are inside block wall cells, under slabs, and in attic spaces where a flashlight can't reach. That's why effective scorpion control in Scottsdale combines three things: targeted treatment of harborage areas with products that work on scorpions, home sealing to close entry points, and elimination of the insect prey base that attracts them. At **Scorpion Control Scottsdale**, we often ask new customers to do a blacklight walk before our first visit — the counts and locations help us build a treatment plan specific to your property rather than a generic spray-and-pray service. If your hunt turns up more glowing visitors than you expected, or you're finding them inside, get a professional assessment. Late summer is peak activity season in Scottsdale, and populations found now are far easier to knock down before they overwinter inside your walls. ### Need Help? Contact us today for a free, no-obligation quote. Get Free Quote (480) 542-0107