Las Vegas sits in the Mojave Desert, but that doesn’t mean it’s free of biting bugs. The warm climate, irrigated landscaping, and resort pools create pockets of habitat that support mosquitoes, scorpions, bed bugs, and a surprising range of other biting insects and arachnids. Whether you’re a visitor checking into a hotel or a resident dealing with something that stung you in the garage, here’s what you’re most likely dealing with and how to handle it.
The Most Common Biters in the Las Vegas Valley
The list of insects and arachnids that bite or sting in Clark County is longer than most people expect from a desert city. Mosquitoes, bees, wasps, yellow jackets, fire ants, harvester ants, fleas, chiggers, no-see-ums, gnats, horseflies, deer flies, blister beetles, centipedes, spiders, ticks, and bed bugs are all found in the area. Scorpions round out the group and deserve their own discussion.
For visitors, the biggest surprises tend to be mosquitoes (people assume the desert is too dry) and scorpions. For residents, the year-round warm season means encounters with stinging and biting creatures stretch from early spring well into fall, with scorpions and some insects active even in winter on mild nights.
Scorpions: The Signature Desert Concern
The Arizona bark scorpion is the only scorpion species in the U.S. with venom potent enough to cause serious symptoms. Adults range from about 1.5 to 3 inches long, including the tail. They’re pale tan and surprisingly hard to spot against stucco walls and sandy-colored flooring.
A bark scorpion sting causes immediate, often intense pain at the site, followed by numbness, tingling, slight swelling, and warmth. Most healthy adults experience only these local symptoms. In young children or in rare severe cases, the reaction can spread to the whole body: muscle twitching, unusual head and eye movements, drooling, sweating, nausea, rapid heart rate, and difficulty breathing. Children who are stung may cry inconsolably.
Scorpions are nocturnal. They hide during the day in dark, sheltered spots and come out after sunset to hunt insects. Garages, patios, entryways, shoes left near the floor, and folded towels are common hiding places. Because they glow under ultraviolet light, many Las Vegas residents use a portable black light at night to scan foundations, walls, and landscaping for activity.
Keeping Scorpions Out
Prevention is mostly about sealing entry points and removing what attracts them. Check door sweeps and weatherstripping. Seal cracks around utility openings. Fix plumbing or irrigation leaks, since scorpions seek water. Reduce clutter in garages and storage areas, and keep firewood and landscaping materials away from exterior walls. Controlling crickets and cockroaches also helps, because those are a scorpion’s main food source. Get in the habit of shaking out shoes, towels, and any clothing stored near the floor before putting them on.
Mosquitoes and Disease Risk
Irrigated lawns, golf courses, fountains, and backyard pools keep mosquito populations alive in the Las Vegas valley despite the arid climate. West Nile virus has been present in Clark County since 2004, and the Southern Nevada Health District runs an active surveillance program, setting thousands of traps each year and testing tens of thousands of mosquitoes for West Nile, Western Equine Encephalitis, and Saint Louis Encephalitis.
In 2017, an invasive species called Aedes aegypti was trapped in Clark County for the first time. This aggressive, urban-adapted mosquito is capable of transmitting dengue, chikungunya, and Zika virus. It bites during the day, not just at dusk, which catches people off guard. Standard prevention still applies: use EPA-registered repellent on exposed skin, eliminate standing water around your property (even small amounts in plant saucers or clogged gutters), and wear light-colored, long-sleeved clothing during peak activity at dawn and dusk.
Bed Bugs in Hotels and Rentals
Las Vegas hosts tens of millions of visitors a year, and high-turnover accommodations are a known risk factor for bed bugs. Most hotels have protocols for dealing with reports, but that only helps if you catch the problem early.
When you enter a hotel room, check the mattress before unpacking. Pull the sheets back and look for small dark brown spots on the mattress surface, especially along seams and creases. Check the headboard and any upholstered furniture for shed skins, tiny live insects, or fecal spots. Place your luggage on the metal or plastic luggage rack rather than the bed or floor. The smooth legs make it harder for bed bugs to crawl into your suitcase. Keep the rack away from the wall.
If you find signs of bed bugs, notify the front desk immediately. You’ll typically be moved to a different room. Before moving, wash your clothes in hot water (at least 110°F) and dry them on high heat for at least one hour to avoid carrying bugs with you. When you get home from any trip, inspect your suitcase, scrub it with a stiff brush, vacuum it thoroughly, and consider sealing it in a plastic bag for several months. Bed bugs can survive a long time without feeding, so patience matters.
If you’re a resident dealing with bed bugs in a rental, you can report the issue to the Southern Nevada Health District’s Environmental Health Division at (702) 759-0588. The health district asks that you call rather than visit in person, since bugs can hitchhike on clothing.
Kissing Bugs: A Lesser-Known Risk
Southern Nevada is home to several species of triatomine bugs, commonly called kissing bugs. These blood-feeding insects bite animals and humans at night, then hide during the day in wood piles, rock crevices, and wall cracks. UNLV’s Parasitology and Vector Biology lab actively studies their distribution in the Southwest through a citizen science program.
Kissing bugs can carry the parasite that causes Chagas disease, a chronic condition that can lead to cardiac failure. Studies in Arizona and Texas have found high infection rates in collected bugs, and dogs that sleep outdoors in kennels are particularly vulnerable. The good news: transmission to humans in the U.S. remains very low. The parasite spreads through the bug’s feces, not the bite itself, and must be rubbed into the bite wound or into mucous membranes around the eyes, nose, or mouth. Because kissing bugs rarely colonize homes permanently in the U.S., the chain of events required for infection is uncommon. Still, if you find one of these bugs (they’re about an inch long, dark brown or black with orange or red markings along the edges), avoid crushing it with bare hands and save it for identification.
First Aid for Bites and Stings
For most insect bites and stings in the Las Vegas area, the same basic steps apply. Move away from the area where you were bitten to avoid additional stings. Remove any stinger left in the skin. Gently wash the site with soap and water, then apply a cloth dampened with cold water or wrapped around ice for 10 to 20 minutes to reduce pain and swelling. If the bite is on an arm or leg, elevating it helps.
Over-the-counter options include calamine lotion, a baking soda paste, or 0.5% to 1% hydrocortisone cream for itching and irritation. A standard pain reliever can help with discomfort. Most mild reactions resolve within a few days.
Signs That Need Medical Attention
Some reactions go beyond normal swelling and itching. Watch for increasing pain, spreading redness, red streaks leading away from the bite, pus, fever, or a blister that turns purple. These are signs of infection or a more serious venom reaction that needs professional care.
A severe allergic reaction (anaphylaxis) is a medical emergency. Symptoms include difficulty breathing, swelling of the lips, face, or throat, dizziness or fainting, a weak and rapid pulse, hives, and nausea or vomiting. If a child is stung by a scorpion or anyone shows even one or two of these symptoms, call 911. If the person carries an epinephrine auto-injector, help them use it by pressing it against the outer thigh and holding it in place for several seconds. Loosen tight clothing, keep them covered with a blanket, don’t offer anything to drink, and position them to prevent choking if they vomit.