SCORPIONS IN TEXAS

Texas scorpions are one of those things every homeowner in the Hill Country, Central Texas, and the Edwards Plateau eventually has to reckon with. The state is home to 18 documented species, but the vast majority of scorpion encounters , the one on the bathroom floor, the one that fell out of the towel, the one your kid almost stepped on in the garage, involve a single species: Centruroides vittatus, the striped bark scorpion. It's the most widespread scorpion in North America, it's extraordinarily common across Texas, and it's the reason scorpion calls make up a meaningful chunk of pest control work from Austin to Giddings.

The other 17 species mostly live in far West Texas, the Trans-Pecos region, and along the Rio Grande, places where limestone caves, rocky desert terrain, and sparse human population keep encounters rare. If you live in Travis County, Bastrop County, Williamson County, or Lee County, the striped bark scorpion is effectively the only scorpion you need to know.

This guide covers identification, habitat, seasonal behavior, the real risk from Texas scorpion venom, and practical steps for keeping them out of your home. We'll go deep on the striped bark scorpion since that's what most people are actually dealing with, and give you enough on the other species to not be caught off guard if you're out in the field or on a ranch in more remote parts of the state.

The Striped Bark Scorpion (Centruroides vittatus)

If there's a scorpion in your house in Central Texas, you're almost certainly looking at a striped bark scorpion. It's the most widely distributed scorpion in the United States, found across the entire state of Texas and ranging into Louisiana, Arkansas, Oklahoma, Kansas, Colorado, and New Mexico. In Texas, it's present from the Panhandle to the Gulf Coast, though it reaches its highest densities in the Hill Country and Edwards Plateau.

Appearance

• Size, adults typically 2 to 3 inches from pincer to tail tip; females tend to run slightly larger than males
• Color, tan to yellowish-brown overall; two parallel dark brown stripes run the length of the abdomen (the "striped" in the name)
• Tail, long and slender relative to the body; the last tail segment (telson) and stinger are darker than the rest of the animal
• Pincers (pedipalps), relatively slender and long compared to bulkier desert species
• Eyes, two median eyes on top of the head plus smaller lateral eyes; they reflect light faintly but glow intensely under UV

Distribution Across Texas

Striped bark scorpions are found in every region of Texas. They are especially abundant across the Hill Country and Edwards Plateau, the limestone karst terrain running roughly from San Antonio through Austin, Bastrop, and up into the Cross Timbers. Counties like Travis, Williamson, Bastrop, Hays, Comal, Gillespie, and Llano see consistent scorpion pressure year after year. The rock outcroppings, cedar-juniper scrub, and sandy loam soils in these areas provide ideal habitat.

In Lee County, the area around Lexington and Giddings, the post oak savannah transitions into the Blackland Prairie, and striped bark scorpions are a routine pest concern for homeowners and ranchers alike. Elgin in Bastrop County sits right in a high-activity zone where the soils, temperature range, and prey insect populations create excellent scorpion habitat.

Behavior and Biology

Striped bark scorpions are nocturnal hunters. They emerge after dark to hunt crickets, roaches, beetles, and other invertebrates. During the day, they shelter under rocks, loose bark, debris piles, and, critically for homeowners, inside wall voids, attics, and crawl spaces. They are climbers. Unlike ground-burrowing species, bark scorpions will readily ascend vertical surfaces, which is why you find them on walls and ceilings, in upper cabinets, and in the folds of curtains.

Females give birth to live young, 20 to 40 at a time, and carry the brood on their back for several weeks until the juveniles molt and become independent. This means a single pregnant female inside your wall can produce a significant infestation without ever being detected. Juveniles are smaller and paler than adults but just as capable of stinging.

Why They End Up Indoors

Scorpions don't invade homes on purpose in the sense that they're targeting you. They follow food, moisture, and shelter, and modern homes provide all three. The most common reasons bark scorpions enter structures:

• Moisture during dry spells, during the brutal Central Texas droughts of summer, scorpions push inward looking for water. Bathrooms, kitchens, and utility rooms are hotspots.
• Prey insects already inside, if you have crickets, roaches, or silverfish in your home, you have a scorpion food source. Scorpions follow prey.
• Harborage adjacent to the structure, woodpiles, rock landscaping, mulch beds, and debris stacked against the foundation give scorpions a staging area inches from your slab.
• They can squeeze through extremely small gaps, striped bark scorpions can compress their bodies through openings as small as 1/16 of an inch. Gaps around pipes, conduit, weatherstripping, and expansion joints in concrete are all entry points.

Other Texas Scorpion Species

The other Texas scorpions are geographically limited enough that most Central Texas residents will never encounter them. That said, a few are worth knowing, especially for anyone who spends time in West Texas, south Texas, or the Trans-Pecos.

Texas Brown Scorpion (Striped Tail Scorpion)

Sometimes called the Texas brown scorpion, the striped tail scorpion (Hoffmannius spinigerus) is heavier-bodied than the bark scorpion, yellowish-brown with faint striping on the tail segments, and more of a burrower than a climber. It's found in West Texas and into Central Texas in drier, more open terrain. Sting severity is mild. You're more likely to encounter one turning over rocks or in sandy soils than inside a house.

Florida Bark Scorpion

Despite the name, the Florida bark scorpion (Centruroides gracilis) is present in South Texas and along the Gulf Coast. It's one of the larger scorpions in the US, up to 4 inches, and significantly darker than the striped bark scorpion, ranging from reddish-brown to nearly black. It frequently hitchhikes in shipments of potted plants and tropical nursery stock, which is how it occasionally turns up in unexpected places. The sting is more potent than the common bark scorpion; handle with caution if you encounter one.

Trans-Pecos Smoothclaw Scorpion

The Trans-Pecos smoothclaw (Diplocentrus whitei) is a heavy-bodied, dark brown to black scorpion found in limestone canyons and rocky terrain in the Big Bend and Trans-Pecos region. It's a burrower, rarely encountered indoors, and its venom is mild. It looks intimidating, the dark coloring and robust build give it a threatening appearance, but it's not considered medically significant.

What About the Arizona Bark Scorpion?

The Arizona bark scorpion (Centruroides sculpturatus) is the only scorpion in the United States considered genuinely medically significant. It is not established in Texas. It is found primarily in Arizona, parts of New Mexico, California, Nevada, and Utah. Despite what you may read on general pest control websites, the Arizona bark scorpion does not have a resident population in Texas. If someone tells you otherwise, they're either confused about species identification or working from outdated information.

Where Scorpions Live in Texas

The Hill Country and Edwards Plateau are ground zero for scorpion activity in Texas. The combination of limestone bedrock (which provides rocky crevices and talus), cedar-juniper and live oak woodland (which produces loose bark), abundant prey insects, and warm temperatures that extend activity season creates ideal conditions. Counties consistently seeing high scorpion pressure include Gillespie, Mason, Llano, Burnet, Blanco, Hays, Comal, and Kendall.

Moving east into the urban corridor, Travis County (Austin) and Williamson County (Round Rock, Georgetown, Taylor, Hutto) see significant scorpion activity, particularly in newer subdivisions built on old rangeland. When developers grade land for housing, they disturb existing scorpion habitat and push the resident population into, and under, new construction.

Bastrop County, including the communities of Bastrop, Elgin, and Smithville , sits in a transition zone between the post oak woods and the Blackland Prairie. Scorpions are a common pest complaint throughout the county, with Elgin residents seeing particularly regular encounters given the sandy, well-drained soils and the proximity to the Lost Pines area. Out in Lee County, around Lexington and Giddings, scorpions are a ranch and rural homestead reality more than an urban pest problem, though they absolutely make it inside homes.

Outside the Hill Country corridor, scorpions are still present but less concentrated. East Texas (piney woods) and the Gulf Coast have lower scorpion density. The Panhandle has striped bark scorpions but at lower population levels due to colder winters and flatter terrain.

Are Texas Scorpions Poisonous?

Technically scorpions are venomous, not poisonous, the distinction being that venom is injected (via sting) while poison is ingested. But the common question, are Texas scorpions dangerous?, has a nuanced answer.

For most healthy adults, a striped bark scorpion sting is intensely painful but not life-threatening. The venom produces a sharp burning or electric sensation at the sting site, followed by localized numbness, tingling, and swelling that typically subsides within a few hours. Some people experience pain lasting 24 to 48 hours. The sting is genuinely unpleasant, not something to dismiss, but it's in the same category as a bad bee sting rather than a medical emergency for most people.

The real concern with bark scorpion stings in Texas is allergic reaction. A small percentage of people have severe allergic responses to scorpion venom, including anaphylaxis, the same risk profile as severe bee sting allergy. Children, the elderly, and immunocompromised individuals may have more significant reactions to the venom itself. If you've been stung and are experiencing difficulty breathing, swallowing, severe swelling beyond the sting site, or a racing heartbeat, seek emergency care immediately.

Again: the Arizona bark scorpion, the one scorpion in the US with venom potent enough to cause serious systemic effects in healthy adults, is not found in Texas. The scorpions Texans deal with are painful. They are not, for most people, in the same threat category as their Arizona counterpart.

When Are Scorpions Active in Texas?

Scorpion season in Texas runs roughly from April through October, peaking in the hot summer months of June, July, and August. Activity closely tracks nighttime temperatures, scorpions become more active when nights stay above 60°F, which in Central Texas means they're essentially active from spring through fall with little let-up.

During winter, scorpions don't truly hibernate but enter a period of reduced activity called diapause. They shelter deep in cracks, under rocks, or inside wall voids and emerge on warm winter nights, you can still find active scorpions in Texas in January and February during mild spells. This is why scorpion treatment isn't a purely seasonal concern; a population harboring inside a structure will be present year-round.

Nocturnal activity peaks in the first few hours after dark. Most indoor scorpion encounters happen between 9pm and 2am. That's when they're actively hunting and moving, and when the accidental barefoot-on-a-scorpion incident is most likely to occur.

The highest encounter rates inside homes typically follow two patterns: the onset of hot, dry weather in late spring (when scorpions push inward for moisture), and the first significant cold snap in fall (when they're seeking warmth). Pre-treating for scorpions in March or April, before the season ramps up, is far more effective than reactive treatment after you've already found them inside.

Why Scorpions Come Inside Homes

Scorpions are not attracted to your home specifically, they're attracted to what your home offers. Understanding the drivers helps you address the root cause rather than just reacting to individual scorpions.

• Water, during Texas drought conditions, scorpions follow moisture gradients. Condensation on pipes, moisture under sinks, pet water bowls, and leaky irrigation systems near the foundation are draws.
• Prey insects, if you have crickets, roaches, silverfish, or earwigs inside, scorpions will follow. Controlling general insects dramatically reduces scorpion pressure.
• Harborage at the foundation, woodpiles against the house, rock gardens, mulch, stacked lumber, cardboard boxes stored in the garage, and cluttered storage areas all function as scorpion hotels. The closer these are to entry points, the more likely scorpions are to move in.
• Temperature, in summer, structures offer cooler microclimates. In winter, they offer warmth. Scorpions aren't being strategic about it, but the thermal environment inside your walls is favorable.
• Gap access, a scorpion can fit through a gap the width of a credit card. Expansion joints in concrete slabs, gaps around plumbing penetrations, worn weatherstripping, and the space under doors all function as entry points.

How to Identify a Scorpion Sting

A scorpion sting is usually unmistakable. The immediate sensation is an intense, sharp burning or electric pain at the sting site, often described as similar to a wasp sting but more acute. Within minutes, the area may develop localized redness and swelling.

Common symptoms of a striped bark scorpion sting:

• Intense burning or stinging pain at the sting site, immediate onset
• Localized numbness and tingling that may spread a few inches from the sting
• Minor swelling and redness at the site
• Pain that typically peaks within the first hour and resolves within 4–12 hours
• Sensitivity at the sting site that persists for 24–48 hours in some cases

What to do: Wash the sting site with soap and water. Apply a cold compress to reduce swelling. An over-the-counter pain reliever (ibuprofen or acetaminophen) can help manage discomfort. Keep the affected limb at or below heart level.

Seek emergency care immediately if you experience: difficulty breathing, swallowing, or speaking; severe swelling beyond the sting site; rapid heart rate or palpitations; nausea and vomiting; muscle spasms or involuntary movement; or symptoms in a child under two. These may indicate an allergic reaction or an unusually severe venom response.

How to Get Rid of Scorpions in Texas

Effective scorpion control is layered, there's no single spray that solves the problem, and anyone telling you otherwise is oversimplifying. A complete approach combines exclusion, habitat reduction, prey control, inspection, and professional residual treatment.

1. Seal Entry Points

Because scorpions can compress through gaps as small as 1/16 inch, exclusion requires careful attention to detail:

• Inspect and replace worn door sweeps and weatherstripping on all exterior doors
• Seal gaps around plumbing and electrical penetrations through the slab or walls with caulk or foam backer rod
• Fill expansion joints in concrete with appropriate sealant
• Check weep holes in brick veneer, standard weep holes are large enough for a scorpion. Weep hole covers designed for pest exclusion are available and effective.
• Ensure window screens fit tightly with no tears or gaps at the frame

2. Reduce Harborage

• Move woodpiles away from the structure, stack firewood at least 20 feet from the house
• Remove or relocate decorative rock, flagstone, and landscape timbers within 3 feet of the foundation
• Keep mulch beds thin and pulled back from the foundation
• Clear debris, cardboard, and clutter from the garage floor and around the exterior perimeter
• Trim plants and ground cover away from the foundation so there's a clear dry zone

3. Control Prey Insects

A general pest control program that targets crickets, roaches, and other invertebrates inside and around the home removes the food source that attracts scorpions. This is one of the most underappreciated steps in long-term scorpion management. Reduce the prey, reduce the predator.

4. UV Blacklight Inspection

All scorpions glow bright blue-green under ultraviolet (UV) light. This fluorescence, caused by compounds in their exoskeleton, makes a UV flashlight one of the most effective tools for finding scorpions at night. Walk the perimeter of your home after dark with a blacklight and you'll reveal any scorpions active along the foundation, in landscaping, on the exterior walls, or in the garage.

A UV blacklight inspection also works indoors, sweep it along baseboards, under appliances, in closets, and along the garage perimeter. This is how professionals confirm scorpion activity and gauge population density before and after treatment.

5. Professional Residual Barrier Treatment

DIY aerosol sprays and contact kill products have limited effectiveness against scorpions because scorpions walk on the tips of their legs and claws, reducing the body surface area that contacts treated surfaces. Professional scorpion treatments use residual insecticides formulated to work against arachnids, applied as a barrier around the foundation perimeter, in the garage, along the interior perimeter at the baseboard, and in harborage zones.

Effective professional treatment focuses on:

• Exterior perimeter application along the foundation and up the exterior walls
• Treating expansion joints and other crack-and-crevice entry points directly
• Interior baseboard and perimeter treatment in problem areas
• Garage treatment (one of the highest-activity zones in most homes)
• Repeat service every 60–90 days during active season to maintain residual efficacy

Cowboy Pest Eliminators' scorpion control service combines UV blacklight inspection, targeted residual treatment, and harborage reduction recommendations tailored to your specific property. We serve Lexington, Elgin, Austin, Bastrop, Taylor, Giddings, and surrounding Central Texas communities.

Common Questions

Are scorpions in Texas poisonous?

They're venomous rather than poisonous (venom is injected, poison is ingested), but yes, Texas scorpions can deliver a painful sting with real venom. For most healthy adults, a striped bark scorpion sting causes intense localized pain that resolves within hours. It's genuinely unpleasant but not life-threatening for most people. The key concern is allergic reaction, and extra caution is warranted for young children and elderly individuals. The one US scorpion with venom potent enough to cause serious systemic effects, the Arizona bark scorpion, is not found in Texas.

Where do scorpions live in Texas?

Scorpions are found across the entire state, but they're most concentrated in the Hill Country, Edwards Plateau, and Central Texas, particularly in counties like Travis, Williamson, Bastrop, Hays, Comal, Llano, and Burnet. In and around Lexington, Elgin, and Giddings, striped bark scorpions are a consistent pest concern. They shelter under rocks, loose bark, debris, and inside wall voids and attics of homes.

When is scorpion season in Texas?

Scorpion season in Texas runs from approximately April through October, with peak activity in June, July, and August. Activity is tied to nighttime temperatures, scorpions become most active when nights stay above 60°F. In mild years, scorpion activity can persist well into November. During winter, scorpions enter a period of reduced activity but don't fully hibernate , warm winter nights can still bring them out, and a population inside your walls is active year-round.

Is it illegal to kill scorpions in Texas?

No. Scorpions in Texas are not protected under state or federal law. You are free to kill, trap, or remove them from your property without any legal concern. There are no scorpion species on the Texas endangered species list or any other protected status list in the state.

What kills scorpions instantly?

Honest answer: very few things work reliably for instant kills, and "instant kill" isn't really the goal of effective scorpion control anyway. Direct contact with strong pesticide aerosols can kill a scorpion quickly, but you have to spray it directly and scorpions are often not where you can reach them. A boot heel works fine for an individual scorpion. The real strategy is residual barrier treatment, insecticides applied to surfaces the scorpion walks across, combined with exclusion and harborage reduction. This is how you reduce a population over time rather than playing whack-a-mole with individual insects.

Do scorpions glow under UV light?

Yes, every scorpion species glows bright blue-green under UV (ultraviolet) light, including all Texas species. This fluorescence is caused by compounds called beta-carbolines in their cuticle (exoskeleton). The reason for it isn't fully understood scientifically, but it's extremely useful for homeowners and pest professionals. A UV blacklight flashlight is one of the best tools available for finding scorpions at night. Even shed exoskeletons glow, which can help confirm recent activity.

Are bark scorpions in Texas dangerous?

The striped bark scorpion (Centruroides vittatus), which is the bark scorpion species in Texas, is painful but not considered medically significant for most healthy adults. It is not the same species as the Arizona bark scorpion (Centruroides sculpturatus), which is the genuinely dangerous species found in the Southwest. Texas bark scorpion stings warrant medical attention if symptoms go beyond local pain, especially in children, the elderly, or anyone with a history of allergic reactions to insect stings.

What attracts scorpions to a house?

Three things: water, prey, and shelter. During dry Texas summers, scorpions move toward moisture, bathrooms, kitchens, and utility rooms are common encounter spots. If your home has a population of crickets, roaches, silverfish, or other insects, scorpions will follow the food source. And harborage right against your foundation, woodpiles, rock landscaping, heavy mulch, clutter, gives scorpions a staging area just inches from entry points into the structure.