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Snakes in Las Vegas, what is actually out there
Four rattlesnakes you can realistically meet around this valley, a long list of harmless ones people kill by mistake, and the current medical advice for a bite. Which is nothing like what most pages still tell you.
Bitten right now? Stop reading and call.
Call 911 and get moving toward an emergency room. Poison Help is free, confidential and staffed around the clock by nurses, pharmacists and toxicologists. Take off rings and anything tight before swelling starts. Do not cut, do not suck, do not apply a tourniquet, do not ice it, and do not wait to see whether it gets worse.
General information from a local, not medical advice. It does not replace an emergency room. Full step-by-step below.
I’ve lived in Las Vegas since I was five, and the snake page I keep finding online tells people that Nevada has copperheads and water moccasins. It does not. Not one, not anywhere in this state, and not in any state that touches it.
That error is not harmless. Somebody reads it, meets a perfectly ordinary gopher snake in their side yard, decides it must be a copperhead, and goes at it with a shovel. That is how people get bitten. Roughly one in five bites in this country happens because a person chose to interact with the snake, and those bites land on hands and arms.
Three snakes Nevada does not have
Every one of these turns up on Las Vegas snake pages. None of them lives here.
Copperhead → almost always a Great Basin gopher snake
An eastern snake. Its range runs from Massachusetts down the Appalachians and west to eastern Texas. The nearest wild one is over a thousand miles from here. The gopher snake is tan with dark brown blotches, out in daylight, and completely harmless.
Water moccasin, or cottonmouth → a gartersnake near water
A semi-aquatic snake of southern swamps and slow rivers, with a western limit in east Texas. The Mojave has no habitat it could survive in. Any snake near a pond, a golf course or the lake here gets called a moccasin, and it is a gartersnake.
Coral snake → a long-nosed snake, and that rhyme is useless here
The Sonoran coral snake stops in central and southern Arizona and never reaches Nevada. If you learned red-touch-yellow as a kid, it applies to nothing in this state. The banded red, black and cream snake in your yard at night is a harmless long-nosed snake.
Four rattlesnakes, and the one you’ll actually meet
Nevada has six rattlesnake species. Start with the one that turns up in local reports more than any other.
Southwestern speckled rattlesnake
It lives in rock, which in this valley means Red Rock, the Calico Hills, Frenchman and Sunrise Mountain, and the River Mountains. Its color tracks whatever stone it is sitting on, from gray to brown to a pinkish salmon.
That camouflage is the entire problem. People do not walk up on a speckled rattlesnake because they ignored it. They walk up on it because it looked like the rock. This is the species behind BLM’s posted warning at Red Rock about never putting a hand or foot anywhere you cannot see.
The one everybody calls the Mojave green, though it is not reliably green and other rattlesnakes sometimes are. Its venom is medically distinctive rather than simply strongest. In this part of the desert it often causes less dramatic early swelling than you would expect, which is a reason to get to an ER faster, not slower.
Nevada’s smallest rattlesnake, under about two and a half feet, named for the sideways looping way it crosses loose sand. Mostly nocturnal in summer, and its rattle is small enough that you may not hear it in any wind.
This is the rattlesnake up in the Spring Mountains, not the Great Basin rattlesnake that northern Nevada gets. Worth knowing, because a lot of people head to Mount Charleston assuming elevation means no snakes.
Nevada’s largest, three to six feet, but it stays down around Lake Mohave, Searchlight and Laughlin. If you think you saw one in Summerlin, you almost certainly did not.
Southern Nevada’s venomous lizard, sixteen to twenty inches, slow, reclusive and protected under Nevada law. Bites are extremely rare and essentially always happen to somebody who picked one up. Look, photograph, walk away.
Color is not a reliable way to identify any of these. They match whatever ground they live on, the Mojave is not dependably green, and a speckled can be gray, brown, orange or salmon. Treat every rattlesnake exactly the same way.
Rattlesnake, or the snake pretending to be one?
The gopher snake does a convincing rattlesnake impression and gets killed for it constantly. This is the one comparison worth memorizing.
Rattlesnake
- TailStacked rattle segments and a blunt end
- SoundA dry buzz coming from the rattle itself
- HeadBroad and triangular all of the time
- BodyThick and heavy through the middle
- PupilsVertical slits, like a cat
Gopher snake
- TailTapers to a point, no segments at all
- SoundLoud hissing, plus tail vibrating against gravel
- HeadNarrow, but it flattens into a triangle when bluffing
- BodyLonger and more slender for its length
- PupilsRound
Read the last line of each column again. The correct response is identical, which is the point. Two things worth knowing either way: a rattlesnake can strike about two thirds of its body length, and it may not rattle first. Silence is not safety.
Snakes worth leaving exactly where they are
Most of what turns up in a Las Vegas yard is on this list. Two of them are working in your favor.
They don’t arrive in spring. They were here all along.
Nothing invades. Snakes become surface-active as it warms, and more people are outside to see them. Both things happen at once, and it reads as an influx.
Brumation is the reptile version of hibernation, spent in burrows and rock crevices. They can still stir on an unusually warm January day, so a winter sighting is not a contradiction.
Spring and fall: daytime
Mild air means mild rock, so they bask and move in the open. This is also when the most people are on trails, which is why reports spike.
Summer: dawn, dusk, dark
Above about 90 degrees the ground will kill them. In July the risky hours are the early hike and the evening dog walk. Not high noon.
Winter: mostly underground
Down in rodent tunnels and rock crevices with their metabolism way down. A warm spell can still bring one out to bask.
Where you are actually most likely to meet one
Not in a parking lot. On rock, in a wash, or with a hand on a ledge you cannot see the top of.
BLM’s posted guidance is blunt: never put your hands or feet anywhere you cannot see. The Calico scrambling and the loose rock on the Turtlehead ascent are exactly that scenario, and speckled rattlesnake is exactly what lives in it.
The Park Service says four rattlesnake species live in the recreation area and to treat all of them as dangerously venomous. Even a newborn can deliver a serious bite. At the Laughlin end, western diamondback enters the picture.
The Panamint rattlesnake occupies rocky ground well up into the Spring Mountains. At Sloan Canyon, BLM’s own wildlife list names Mojave green, speckled and sidewinder, and the petroglyph route is a boulder scramble up a wash.
Six minutes of decisions that matter
Current wilderness medicine guidance, updated 2026. Everything in the right-hand column was standard advice once and is now explicitly recommended against.
- Call 911 and head for an ERAntivenom is widely available across the valley. Do not research which hospital has it. Let 911 route you, and do not drive yourself if there is any alternative.
- Strip off rings and anything tightImmediately, before swelling starts. Watches, bracelets, tight shoes. Swelling is fast and a ring becomes a tourniquet.
- Keep the limb still, roughly at heart levelLoosely immobilized. Stay as calm and as still as is practical while you wait or ride.
- Mark the swelling and write the timePen a line at the leading edge, note the time, repeat every fifteen or twenty minutes. It gives the ER a rate of progression and they will use it.
- Wash gently, cover looselySoap and water, then a clean dry dressing. That is the whole of the wound care you should be doing.
- No tourniquet or constricting bandConcentrating venom in a limb makes the local tissue damage worse.
- No cutting, no suctionNot a kit, not your mouth. Extractor devices have been studied. They remove no meaningful venom and add tissue damage. Throw the one in your pack away.
- No ice, no electric shock, no alcoholAll three are old advice, none of them help, and the guidelines say plainly they can cause harm.
- No ibuprofen or aspirinBleeding risk, on top of a bite that may already be affecting clotting.
- No waiting to see how bad it getsA quarter of bites are dry, but nobody can tell that in the field. Mojave venom here can also look mild early and turn neurological later.
- Never touch the snake, alive or deadA severed rattlesnake head can still reflexively bite and inject venom for a long time. This is how second bites happen.
Roughly 7,000 to 8,000 venomous snakebites happen in the US each year, and about five deaths. A Las Vegas emergency department chair put the odds of dying from a rattlesnake bite here at well under one percent. It is a serious emergency that is very rarely fatal once it is treated.
What actually keeps snakes out of a Las Vegas yard
Snakes follow food. Almost everything here is really about rodents, and the rest is about holes.
This is the whole ballgame. If you have mice, you have the thing that brings snakes. Everything below is secondary to it.
Spilled seed under a feeder feeds rodents all night. Move it off the house, use a catch tray, sweep, and store seed in sealed metal.
An outdoor kibble bowl is an overnight buffet. Keep pet food in sealed metal containers too.
Very Las Vegas and very overlooked. Those drainage gaps at the base of a CMU wall are a highway. Stainless mesh covers are made for exactly this.
A worn bottom sweep, and especially the triangular gaps at the bottom corners, is how most of them get inside a house here. Stop propping it open in the evening.
Foundation cracks, gaps around pipe and conduit penetrations, vents, crawlspace openings, door sweeps. They get through less than you think.
Two to three feet of clearance between shrubs and the house. Clear woodpiles and debris. Skip the decorative boulder stacks, which are just habitat.
Standing water, a dripping bib and a leaky drip line all pull in rodents, insects and lizards. Which pull in snakes.
Snake repellent does not work. None of it.
University extension guidance calls commercial snake repellents and sulfur ineffective, and mothballs do not work on snakes at all. Using mothballs outdoors for this purpose also violates the product label and is a real hazard to children and pets. Ultrasonic stakes have no credible evidence behind them either. There is nothing you can sprinkle, spray or stake into the ground that keeps snakes out of a yard. Rodent control and physical exclusion are the only two things that change anything.
There is a snake on my property
The answer depends almost entirely on one question.
Call NDOW, or 911
Nevada Department of Wildlife will dispatch a game warden for a snake inside a home. Southern Region is open during business hours. If it is between you and the door, or pets and kids cannot get clear, call 911 instead and do not wait.
702-486-5127 NDOW Southern Region
Usually, leave it alone
NDOW’s own position is that trying to harm, kill or move a rattlesnake is what puts you at risk. Give it room and time and it moves on. They will also identify a snake from a photo. Clark County Animal Protection takes snake calls, but only for unincorporated county, not inside Las Vegas, North Las Vegas, Henderson or Boulder City.
702-455-7710 Clark County APS
If it genuinely will not leave a doorway or a dog run, a licensed private removal company is the realistic option, because no agency is obligated to clear your backyard. Ask for two things when you call: relocation rather than extermination, and a written exclusion assessment covering the weep holes, the garage seal and the foundation gaps. A one-time catch without the exclusion work just means you do this again next spring.
If your dog meets a rattlesnake
That is the window Boulder City Animal Control tells people to work with
Get to an emergency veterinary hospital and call ahead so they can have antivenin ready. Keep the dog as calm and still as you can and carry it if that is safe. Most dog bites land on the muzzle or a front leg, and the swelling comes fast.
Same rules as people on what not to do: no tourniquet, no cutting, no suction, no ice, and absolutely no human painkillers. Ibuprofen and aspirin carry a bleeding risk on top of a bite that may already be affecting clotting. Do not go looking for the snake.
The American Animal Hospital Association does not recommend it and notes there are no published efficacy data in dogs. Some vets in high-exposure areas still offer it as a hedge. The part that matters most is that it is not a substitute for emergency care. A vaccinated dog that is bitten still goes to the animal ER immediately.
Traditional clinics use live snakes and e-collar corrections. Other trainers here run positive-reinforcement versions and object to the first approach on welfare and efficacy grounds. Both exist in Las Vegas, the disagreement between them is genuine, and you should pick the one you are comfortable defending.
You do not need to know which snake it is. You need to be eight feet away from it.
Lori Ballen · lifelong Las Vegan
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What people actually ask me
Are there copperheads or water moccasins in Las Vegas?
No. Neither species occurs anywhere in Nevada. The copperhead is an eastern snake whose range stops well east of here, and the cottonmouth is a semi-aquatic southeastern snake that could not survive in the Mojave. If a page tells you otherwise, that page has not been checked in years.
Is the Mojave green really the most venomous rattlesnake?
That framing is more dramatic than useful. Its venom is medically distinctive: most Mojave rattlesnakes in this desert carry a neurotoxin other North American rattlesnakes lack. The practical consequence is the opposite of what people assume. The bite can look and feel milder early while neurological effects develop later. A reason to move faster, not to relax.
Do snake repellents work?
No. Extension guidance calls commercial repellents and sulfur ineffective, and mothballs do not work on snakes at all. Using them outdoors for this purpose violates the product label and is a genuine hazard to kids and pets. Ultrasonic stakes have no credible evidence either.
Should I get my dog the rattlesnake vaccine?
Talk to your vet, and go in knowing the evidence is thin. The American Animal Hospital Association does not recommend it and notes there are no published efficacy data in dogs. Whatever you decide, it is not a substitute for emergency care.
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Lori Ballen
REALTOR® with Keller Williams Realty Las Vegas, leading The Ballen Group. A lifelong Las Vegan sharing the best of the valley.
As an Amazon Associate, I earn from qualifying purchases. Some links on this site are affiliate links. Portions of this content are generated by AI.
