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Mexico Poisonous and Venomous Snakes, Spiders and Insects

Updated on August 8, 2018

Venomous snakes, spiders & bugs in Mexico.

Mexico, home to venomous killer caterpillars, poisonous spiders, fatal tsetse fly, blood sucking deer ticks and the ancient Aztecs. Mexico is an adorable country, absolutely beautiful, with world class hotels and superb beaches providing fantastic cheap vacations.

But Mexico is full of poisonous insects and snakes in virtually every place you could go to, killing hundreds of people every year, and infecting thousands more, including tourists.

When in Mexico, or any other foreign country, please remember to pack anti-histamine tablets, these will help if you are ever bitten, and if someone you know has been bitten by a snake, never suck out the poison.

Tourist Warning: Police & Taxi Driver Kidnap Tourists For Ransoms

Very Small Brown Recluse Spider
Very Small Brown Recluse Spider

The Brown Recluse Spider

The Brown Recluse Spider, or the Violin Spider, are very small and grow between 6-20mm in size, but they can pack a huge punch. They like undisturbed placed like garages, and wood or rock piles, but are frequently found in the house behind wardrobes, in clothes or linen piles, cupboards and under beds.

They are nocturnal creatures and if the male goes hunting at night, it can often be found in temporary cover, like footwear, discarded bras, or drawers.

Venomous Brown Recluse Spiders are not aggressive, but when they feel threatened, they will attack. Most of the bites from these spiders go by unnoticed, which is where the danger lies.

Many of these bites will come to nothing more than a bit of itching and swelling, whereas some, as you can see by the picture above, are a bit more serious. Once a Brown Recluse Spider bites someone, the venom will be throughout their blood system in minutes, but still giving the person time to seek medical attention before serious internal injuries can happen.

Most fatalities occur in younger children up to the age of seven, the elderly or anyone with an insufficient immune system. Even a cold or simple illness can cause these bites to turn into something deadly.

If bitten symptoms may include vomiting, rashes, fever and joint pain, which may eventually lead to coma and death. Seek medical attention immediately if anybody has been bitten.

This is Mexico's most venomous spider. Whilst on vacation or on holiday to Mexico, ensure to check clothes before they are worn.

Tourist Warning 2: Kidney Harvesting Crime in Mexico

Very, Very Dangerous Caterpillars
Very, Very Dangerous Caterpillars

Puss Caterpillar

The puss caterpillar goes by many different names, such as the Tree Asp, Southern Flannel Moth, Pussy Moth, and the Asp Caterpillar. This moth is only dangerous in its caterpillar stage.

The caterpillar is covered in tiny reddish hairs, and all these are attached to venom glands, and once anything comes into contact with the very sharp hairs, they are injected with venom through the hair.

Symptoms of caterpillar hair poisoning are nausea, rashes, blisters, abdominal pains, swelling, burning sensations, numbness, chest pains, difficulty in breathing and death. If injected by these furry critters, get help immediately, stop for nothing, your life may depend on it.

Many vacations to Mexico have been ruined when children pick up these caterpillars to play with.

Tiny Tick, Big Bite
Tiny Tick, Big Bite

The Deer Tick

The Deer Tick, sounds like a normal little animal tick which obviously is attracted to animals, and you would be right, does bite humans.

If a tic bites a person, 99% of the time, they do not notice the initial bite, and the tic can stay on the body, drinking your blood, for nearly four days, before it falls off, full.

The Deer Tic can give its host Lyme Disease, and the initial symptoms of this are headache and fevers, and as time goes by, stiff joints and heart problems, possibly leading to death. If bitten, or even if you suspect a bite, see a doctor, if not treated quickly, the bitten person can suffer with these medical problems for years.

Tourist Warning 3: Mexican Drug Tunnels to Forida, Arizona and Texas.

Assassin Bug Bite
Assassin Bug Bite
Assassin Bug
Assassin Bug

Assassin Bug

The Assassin Bug has over thirty different names, but the disease they carry, Chagas Disease, is still the same. It is estimated the nearly eleven million people in Mexico have this potentially fatal disease, but do not yet know it.

Similar to Mesothelioma ( Asbestos Poisoning ) this disease will stay with you for life, and it may only show itself after twenty to thirty years after the initial bite. Vacations to Mexico are fantastic, but not worth thirty years of pain.

There are several species of this bug, some with bites that you will feel instantly, and some with bites that you will never notice. One of the names of this bug is the Kissing Bug, because they will bite their victims at night around the nose and mouth area. Many people who have felt the bite in the dark have mistook it for a mosquito bite.

Initial bites can be cured with medicines, with a 90% cure rate. If the bite goes untreated, after four weeks, you will be 80% likely to have Chagas Disease for the rest of your life. 40% of these people will develop heart and digestive problems later on in life, with the cause being constantly misdiagnosed.

If bitten by anything whilst on holidays to Mexico, seek medical advice, no matter how trivial it may seem.

Coral Snake
Coral Snake


Mexico is home to over 60 different species of Coral Snakes, all venomous, all bite, some can kill. Coral snakes are regarded as one of the top five most poisonous snakes in the world, killing many people annually, especially in South America and Mexico. Their colors vary, but many have a distinct three colour pattern.

In Mexico, they are called the twenty minute snake, because after you have been bitten, you will be dead within twenty minutes.

Most of these snakes are very small, some about 20cm, but some can grow to 150 cm ( 5 feet ), the venom from the Coral Snake is a neurotoxin, and will immediately begin to attack your breathing systems, and medical attention needs to be given very quickly.

Anti venom is available, but artificial respiration may be required to save the life. If a person is bitten whilst on vacation to Mexico and becomes unconscious, continue with artificial respiration until medical help arrives, do not stop, their life depends on it.


The Screw Worm Fly is a deadly and dangerous tissue eating maggot. It kills herds of cattle, sheep and people. It is now known to be in Mexico, Jamaica, and Panama. It is on Americas most wanted list for deadly insects. Follow the free link to our sister site for more information.

There are many vacation packages and holiday deals to Mexico online. Prior to leaving, ensure about inoculations for everyone.

The most dangerous, venomous and vile creature in Mexico, are drug lords. 25,000 murders occurred in Mexico in 2017, and 2018 may top this number. (Sky news)

Cocaine and marijuana production is a massive problem in Mexico. Always be alert to danger.

Muggings, car jackings, as well as kidnapping, shooting and stabbings seem to be a daily routine in the life of a Mexican city or town.

Kidney harvesting is also getting to be more common. One way this is done is a chance meeting of an attractive person in a bar. A few drinks later the victim is unknowingly given a drug to knock them out.

They wake up in a bath of iced water with a note in front of them and a phone nearby. The note says "Do not move, your kidneys have been harvested, call an ambulance'

Over 30,000 people have been reported as missing in Mexico. This includes students and people whom were on vacation. (reuters)

Whilst On Vacation Or Holiday To Mexico, Did You Come Across :

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    • profile image


      4 months ago

      Have a home in S Baja for 11 years. The only poisonous creature I've seen is scorpions (at night), and they hide when you get close.

    • profile image

      dr david jones 

      2 years ago

      theirs no place like home

    • profile image

      Donald Trump 

      2 years ago

      Boy are you stupid.

    • profile image


      3 years ago

      This is waaaaay to sensationalised! I live in Mexico ... Would not want to live anywhere else ... We had poisonous snakes and brown recluse spiders, dangerous ticks in Canada among other things. What no one should travel to parts of Canada ... Also, yes there are coral snakes here, NOT necessarily a twenty minute death sentence! Our friends daughter is happy and healthy following a coral snake bite. Medical care required asap for sure. She was in hospital for 4 hours and released. It is rare to ever see them. They want to get away from humans as much as humans want to get away from them! We have never seen one. We also have scorpions! Rare they ever sting but it does hurt ... Mexico is an amazing country but if this article scares you off we will have less tourists in our paradise. Unfortunately Mexico needs tourists to support the economy ...

    • profile image


      3 years ago

      Mexico is a huge place, it's not all dangerous. Many of these creatures are also in Canada and the United States. I spend 6 months of the winter each year with my child in the Yucatan. We have never had any problems....

    • profile image

      Jorge Garcia 

      3 years ago

      One more reason not to go to Mexico, if people want to take a,chance thats on them. Not me , it is,better to be safe than sorry.

    • profile image

      Nicholas swan 

      5 years ago

      Found this web page very useful..Going Cancun in April 2015

    • Risha Linda profile image

      Risha Linda Mateos 

      5 years ago from Florida

      Thanks. Good to know. I travel to Mexico often and did not realize they had coral snakes and that poisonous fuzzy caterpillar. In Tennessee I was bitten by a fiddle back (brown recluse) spider and my entire arm swelled up huge and was hot to the touch for a long duration. The pain was terrible. After it healed it left a circular mark or my arm that would erupt from time to time until an old farmer told me that next time it erupted I should light a self striking match, blow it out and stick it in the center of the eruption to cure it. It sounded crazy but I followed his directions and it has never erupted again and I am left with only a small white scar.

    • Eduardo Enriquez profile image

      Eduardo Enriquez 

      5 years ago

      You should make a warning, thos photos are really graphic, now with more reason next time I travel to Mexico I will get every kind of insurance, this article really freak me out, even a car insurance.

    • profile image


      6 years ago

      i got bite

    • profile image

      Kat Katrawitz 

      6 years ago

      Bitten by red ant in Playacar -quiter a nip for a little 'un. Too masny mozzie bites to count.

    • profile image

      Honey rose 

      6 years ago

      thanks for helping for my homework and plus my teacher sent it back to me when I had 177 pages and she said not enough

    • profile image


      7 years ago

      In the assassin bug title you forgot an "s." =-p

    • profile image


      7 years ago

      Well, the Brown Recluse Spider lives in USA too, Texas and other states. I think thet can be only found in the north of Mexico.

    • profile image


      7 years ago

      I live in México, and I travel a lot, I know all of these animals but the catterpillar. I have never been bitten neither by any of them, I'm a biologist so I do not host in the most luxurious hotels and we are usualy in rural places camping. You dont need to freak out and stay in home, just be careful, and avoid zones of risk, and if you go the wild have a tourist guide.

    • profile image


      8 years ago

      tanks for all this information to my homeork

    • profile image

      Ben Shane-Stone 

      8 years ago

      i was close to dying off a shark attack never going back again.

    • profile image


      8 years ago

      OMG kill em all i say !!!

    • WillSteinmetz profile image


      8 years ago

      What hell happen his hand, :D Great hub


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