Scorpion Control in Las Vegas: Bark Scorpions, Sealing and Treatment

A pale scorpion on the bathroom wall at two in the morning. Another in the bottom of the tub, unable to climb out. A third under the pool towel somebody left on the patio. People who call about scorpion control in Las Vegas have usually seen more than one, and they want to know two things: is this the dangerous kind, and can it be stopped.

This page answers both. It covers which scorpions live in the Las Vegas valley, why block walls, palm trees and irrigation suit the bark scorpion so well, how scorpions get indoors, what professional scorpion control involves, and what to do after a sting. The facts come from the Nevada Department of Agriculture, the University of Arizona Cooperative Extension, the University of California and the National Weather Service.

Exterminator Vegas is a referral service, not a pest control company. We do not treat or seal homes, and we hold no pest control license. When you call or send the request form, we connect you with an independent local provider, and that provider handles the inspection, the price and the work. The about page explains how that works.

The scorpions of the Las Vegas valley

The Nevada Department of Agriculture’s training manual for pest control license holders says about 23 species of scorpion are known in Nevada, often with more than one living in the same place. Only one is considered seriously dangerous: the bark scorpion. The manual says it occurs naturally in the far southeast of Clark County, in the Virgin Mountains near Mesquite and at Gold Butte, and that it is also well established in areas of the Las Vegas valley.

You will see two scientific names for it. The Nevada manual uses Centruroides exilicauda, and the University of Arizona uses Centruroides sculpturatus, the Arizona bark scorpion, a species once grouped under the older name. For a homeowner they are the same animal. The University of Arizona calls it the only scorpion of medical concern in the United States.

Scorpion	Size and build	Where it lives	Sting
Bark scorpion	Adults 2 to 3 inches. Slender pincers and a long, thin tail. Color varies from pale to striped.	Crevices: block walls, tree bark, rock, wall voids. A strong climber, often found well above the ground.	The one species whose sting is a medical concern. Most dangerous to small children.
Giant hairy scorpion	The largest in the United States, often over 5 inches. Heavy body, darker back, pale legs.	Under rocks and in shallow burrows in the Mojave and Sonoran deserts.	Mild venom. It eats bark scorpions.
Yellow ground scorpion	Under 3 inches, with a wider, bulkier tail than a bark scorpion.	Short burrows in sandy soil, under surface objects. Reported through much of Nevada.	Relatively mild. It does not usually need medical care.

The simplest field test is where you find it. The Nevada manual says the bark scorpion climbs and takes cover in the cracks of houses and under tree bark, and is often found a fair distance above the ground, while most other Nevada scorpions are ground dwellers. A scorpion on a wall, a ceiling or the inside of a block wall cap is more likely to be a bark scorpion than one found under a rock in the yard. Treat any scorpion you cannot identify as if it were one.

Why bark scorpions do well in Las Vegas yards

The open desert around the valley is a thin living for a scorpion. A watered yard is not. The University of Arizona says homes and buildings with irrigated landscapes can support bark scorpion populations much higher than desert wildland does. The scorpions eat crickets, cockroaches and other insects, drink from small pools of standing water, and are not territorial, so many can share one good hiding place.

A University of Nevada Cooperative Extension horticulture specialist put it plainly on KNPR in 2016: irrigation supplies water for scorpions and their prey, organic material in yards feeds the crickets and cockroaches, and the walls around most homes are full of cracks. In his words, people are providing food, shelter and water.

Block walls

The wall is the most important part of that list. In research on where bark scorpions choose to shelter, the University of Arizona reports that 95 percent preferred hollow block walls over every other refuge around buildings and yards. The Nevada manual says bark scorpions in Las Vegas have been collected from palm trees, the outer walls of buildings and concrete block walls.

The valley’s population tripled between 1990 and 2018, and the Extension specialist quoted above spoke of the walls around most homes. The University of Arizona describes the bark scorpion as common around buildings of all kinds in low desert areas, and often associated with homes and hollow block perimeter walls. A wall on a lot line is shared with a neighbor. That is why scorpion work in Las Vegas so often starts at the wall and not at the house.

Palms, rock and clutter

The Nevada manual singles out palm trees: bark scorpions take cover under tree bark, and under palm bark in particular. The University of Arizona adds rocks, logs, pine cones, ground cover and small animal burrows to the list of shelters. Stacked pavers or a woodpile against the house do the same job as a crack in a wall.

Warm nights

Bark scorpions are active through most of the year in low desert, and the University of Arizona says night temperatures above 70 degrees are ideal. The National Weather Service normals for Las Vegas put the average overnight low at 75.8 degrees in June, 82.0 in July, 80.6 in August and 72.4 in September. By that measure, those four months are the heart of scorpion activity here. Most movement happens between 7 and 11 at night and again from 3 in the morning until sunrise.

From November to March the scorpions are less active, and in the coldest spells they gather in groups in sheltered, undisturbed spaces. The University of Arizona notes that these clusters are often found when a block wall is taken down or a house wall is opened for remodeling in the cool months. A quiet period does not mean the scorpions have gone.

Rain and construction

Scorpions move when they are flooded out of their shelter after irrigation or monsoon rain, and they relocate when earth is disturbed by building or by changes to a yard. The Nevada manual says migrations into homes often follow heavy summer rains, and that desert scorpions most often enter homes in newly developed areas less than three years old. A new pool next door, a wall rebuilt behind you or a July thunderstorm can each produce a run of sightings.

How scorpions get into a house

They need very little room. The University of California’s pest notes say a bark scorpion needs a crack of only one sixteenth of an inch to enter a home. The University of Arizona lists the usual routes: under and around doors that do not fit well, through window vents, under exterior walls with openings, and through the weep holes at the bottom of a stucco wall, which are there to let moisture out of the wall.

Once inside a wall, a scorpion can travel through the shell of the building and come out around an electrical faceplate or a pipe collar. That is why they appear in upstairs bathrooms and interior hallways with no obvious way in. The same source cites a review of calls to poison centers across the country from 2005 to 2015, which found that 98 percent of scorpion exposures happened in or around homes.

• Sinks, tubs and showers. Bark scorpions cross ceilings and fall. They cannot climb out of a smooth basin.
• Shoes and clothing on the floor. A shoe is a ready-made crevice.
• Damp towels. Pool towels left on the ground attract scorpions looking for moisture, and they can end up in the washing machine with the laundry.
• Beds and cribs. Scorpions that drop from a ceiling land where people sleep.
• Garages. The seal under the garage door is one more door seal to check.
• Pools and spas. A scorpion in pool water may not be dead. The University of Arizona says they can survive submerged in chlorinated water for a surprising time and still sting.

What professional scorpion control involves

The providers we work with each set their own process, prices and schedule. The outline below follows what the public sources say works, so you can tell a thorough service from a quick spray.

A night inspection with ultraviolet light

Scorpions glow under ultraviolet light, a pale yellow green according to the Nevada manual. An inspection after dark with a black light shows what a daytime visit cannot: how many there are, which stretch of wall they are coming out of, and whether they are already on the house. Ask for the result as a short map of the property, not just a count.

Sealing the house

The University of Arizona is direct about this: pest-proofing the structure is by far the most effective way to reduce contact with scorpions and the stings that follow. It notes that pest management companies often offer the work. Sealing is slow, detailed labor, and it is the part of a scorpion service that lasts.

• Weatherstripping around doors and windows, fitted snug
• Door sweeps with no gap, including the door from the garage into the house
• Coarse steel mesh over the weep holes in stucco and brick. The holes are screened, never plugged, because the wall needs them to ventilate
• Caulk around roof eaves, pipes and every other penetration through the wall
• Window screens in good repair and tight in their frames
• Gaps closed around electrical faceplates and pipe collars, the places where the University of Arizona says scorpions come out of a wall

Treating where they shelter

The Nevada manual says outdoor insecticide treatment can add to scorpion control, and that treating lawns is not necessary. Which product is used, and where, is a decision for a provider who holds a state license. Ask to see the label.

Be realistic about what treatment does alone. The University of California says pesticides are not always effective against scorpions because they spend the day deep in cracks, and the University of Arizona says scorpions are difficult to manage with pesticides alone. A service that only sprays is leaving out the step both universities put first.

Cutting off the food

Scorpions are in the yard to eat. Reducing crickets and cockroaches takes away part of the reason to stay. The University of Arizona is careful here too: removing food sources can help but will not, without the other steps, clear scorpions from around a home.

The block wall itself

The University of Arizona recommends covering hollow block walls with stucco and capping them, so they are less inviting as shelter. On a shared wall that is a conversation with the neighbor, and with the homeowners association if there is one. Ask the provider what can be done to the wall on your side, and what they see coming over from the other.

Step	What public sources say about it
Sealing the structure	By far the most effective way to reduce scorpion contact and stings (University of Arizona)
Clearing cover from the foot of walls	Removing stones, lumber and debris discourages scorpions (Nevada Department of Agriculture)
Night collection with a black light	Scorpions fluoresce and are easily spotted and removed (Nevada Department of Agriculture, University of California)
Outdoor insecticide treatment	Can increase control. Not always effective, because scorpions hide in cracks by day (Nevada Department of Agriculture, University of California)
Reducing crickets and roaches	Helps, but does not clear scorpions without the other steps (University of Arizona)

What scorpion control can and cannot do

No honest provider promises a yard with no scorpions. The University of Arizona says scorpions are extremely difficult to eradicate, and that clearing them from a landscape entirely would take chemical use that is unhealthy and illegal, for a result that would be temporary. The goal that public sources set is different and achievable: keep scorpions out of the living space and bring the numbers around the house down.

Judge a service by that standard: fewer scorpions on the walls at night, and fewer or none indoors. If you are still finding them inside, the question for the provider is which gap was missed, not which stronger product to use.

Scorpion stings: what the public health sources say

Las Vegas appears in the national figures. The University of Arizona cites a 2017 study of poison center calls that put Las Vegas at 170 reported scorpion stings per 100,000 people, among the higher figures in the country, though well behind Phoenix at up to 677 and Tucson at 584. The same source notes that stings outside Arizona and Nevada mostly involve species of little medical significance. Here, the bark scorpion is in the mix.

A bark scorpion sting usually brings immediate burning pain, with numbness and tingling that can spread. The Nevada manual notes one feature that helps tell it apart: the site does not swell or discolor the way it does with other scorpions. Symptoms generally develop within 20 minutes and can keep worsening for the first four hours. Most healthy adults recover within a day or two, though tingling can last for several days.

The first aid the Poison Help line recommends, as the University of Arizona sets it out, is short.

1. Call Poison Help, the national poison control line. A specialist reviews the symptoms and says whether home care is enough.
2. Wash the area with soap and water.
3. Apply a cool compress for ten minutes, remove it for ten minutes, and repeat as needed.
4. If the sting is on an arm or leg, rest the limb in a supported position.

Poison Help’s official page shows how to reach the line. If someone has trouble breathing, has a seizure or collapses, call 911.

Children are the exception to home care. Severe reactions are more common in small children and can include loss of muscle control, roving eye movements, slurred speech, heavy drooling and trouble breathing. An infant who cries inconsolably for no clear reason may have been stung. The University of Arizona says a sting to a child under 9, or to anyone with high blood pressure, should be treated as serious, and that an antivenom is available for severe cases in some hospitals.

Pets are at risk too. The information in this section is drawn from published public sources and is not medical advice. If someone has been stung, follow what Poison Help or a doctor tells you.

Living with scorpions between visits

These habits come from the University of Arizona, the University of California and the Nevada Department of Agriculture. They cost little and they matter most in a home with small children.

• Check inside the house with an ultraviolet flashlight before bedtime during the warm months.
• Wear shoes outside at night and slippers inside.
• Keep shoes off the floor, and shake out shoes, clothing and pool towels before use.
• Hang pool towels up. Do not leave clothing on the ground indoors or out.
• Clear wood, rocks, stacked pavers and debris from against the house and the foot of the block wall.
• Prune shrubs and tree branches back from the walls and roof. Branches give scorpions a path onto the roof.
• Keep ground cover low and sparse near the house.
• Bring firewood straight to the fire. Do not store it indoors.
• Teach children not to touch a scorpion and to tell an adult when they see one.

If you collect scorpions yourself at night, the University of Arizona’s advice is boots and long tongs, never bare hands. You can also leave that to a provider.

What scorpion control costs

Exterminator Vegas sets no prices, and we have not found a public cost guide that publishes a separate figure for scorpion control in Las Vegas. HomeAdvisor’s national pest control cost guide, as it read in October 2026, puts a typical pest control visit at $108 to $261 and does not list scorpions on their own. That is a national figure for general pest control, so treat it as background only. A scorpion job is priced on the property.

• Sealing. The number of doors, windows, weep holes and penetrations, and whether the home has one story or two.
• The block wall. Its length, and whether both sides can be reached.
• Night visits. Inspections and collections after dark are extra trips.
• The yard. Palms, rock features, valve boxes and dense planting all add time.
• How the work is sold. Ask whether sealing is a one-time charge, and whether treatment is sold as a plan beside it.

Ask for the sealing and the treatment to be priced as separate lines, so you can see what each one costs and compare quotes fairly.

Where scorpions turn up in the valley

We found no public agency map of bark scorpions by neighborhood, and we will not invent one. What the sources describe is a set of conditions: hollow block walls, palms, rock, irrigation and warm nights. Those conditions exist across the city of Las Vegas, in Summerlin, The Lakes, Desert Shores, Peccole Ranch and Centennial Hills, and across the city line in Henderson and North Las Vegas, which are separate cities. The state manual says only that the bark scorpion is well established in areas of the valley.

The practical question is your own block. If neighbors are finding scorpions, assume the shared walls hold them, and tell the provider your nearest cross streets and whether anything nearby has been built, torn down or flooded lately. For other pests in the same yard, see the general guide to hiring an exterminator in Las Vegas.

Questions to ask a scorpion control provider

• What is your company’s Nevada Department of Agriculture license number, and does it include category C2?
• Do you inspect at night with ultraviolet light before you quote?
• Do you seal the house yourselves, and what exactly is included?
• How do you handle weep holes?
• What will you treat, with what, and can I see the label?
• What do you do about the block wall, and about the neighbor’s side?
• How many follow-up visits are included, and what happens if I keep finding scorpions indoors?
• Can I see current proof of insurance?

The license check is yours to make. The Department publishes its list of license holders on its Pest Control program page.

Quick answers