1. Black Widow Spider – Georgia

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The Black Widow Spider is small but deadly. It has gained a reputation for being one of the deadliest spiders if not THE deadliest spider in the world. It is 15 times more poisonous than a rattlesnake. And if it stings, it can cause nausea, breathing difficulties, and muscle pain.

2. Red Widow Spider – Florida

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The Red Widow Spider is of a similar name to the Black Widow and is also a deadly spider. If you are unlucky enough to feel its sting, the venom can cause permanent muscle spasms. The venom in the spider is a neurotoxin which is very poisonous and damaging.

3. Africanized Honeybees – Texas

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The Africanized Honeybee is a cross between two different types of bees which together has made a killer bee. The bee is super-fast and very aggressive. It will respond faster than any other bee and react by stinging more. They can cause death even to humans.

4. Brown Recluse Spiders – Kentucky

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Brown Recluse Spiders are very hard to spot because they camouflage. They can be hiding in the woods. Their venom can make you ill as well as potentially scarring your skin. These spiders are not aggressors, they will harm you if you come into contact with it accidentally for example.

5. Red Harvester Ants – Texas

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These red ants are not like the usual ants you may be used to see seeing, and not the red ants which sting slightly. The Red Harvester Ants have a sting which is extremely strong and brutal. One thing is guaranteed if this bites you – it will seriously hurt you.

6. Fire Ants – Houston

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Fire ants are just about as friendly and inviting as they sound. They have huge hives, which collect against intruders and attack them or even kill them. And they will also sting humans too with their fiery sting. They are now being considered as the most invasive species within the USA.

7. Striped Bark Scorpions – Kentucky

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Striped Bark Scorpions are an insect which have a sting that is so sharp and painful that it will last for days on end. They are very small, yet they can cause a lot of damage and pain, nonetheless. However, they have not been responsible for any known deaths.

8. Paper wasps – North Carolina

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Paper wasps have a sting that is guaranteed to hurt you, however in terms of health affects you will be absolutely fine. It looks very much like a wasp; however, its wasp will sting you more than the usual kind despite the fact that they are very similar in size.

9. Sac Spiders – Michigan

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The sac spider has apparently bitten more people than any other spider. When it bites, the pain will last around 10 hours, with swelling, bruising and perhaps even blistering. Thankfully, it does not usually have any serious ill or long-lasting effects.

10. Moth Caterpillars – Louisiana

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Moth Caterpillars are certain kind of caterpillar. One man described the pain of being bitten by a Mothb Caterpillar as horrendous. And when he was asked if it compared to a bee sting, he exclaimed that it was nothing like a bee sting and this was far more painful.

11. Tarantulas – Texas

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The tarantula is a very commonly known species. And it is very big in comparison to the usual insect. They are not a spider which will frequently bite, only when they really feel under threat. And when they do bite, you certainly know it by the red swelling and muscle spasms.

12. Oriental Rat Fleas – Arizona

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The Oriental Rat Flea is the rat flea that killed much of the population back in the Middle Ages through the plague, which has been eradicated in most countries. The rat fleas carried the disease and latched on to rats, which was then spread by the creatures.

13. Wheel bugs – Florida

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Wheel bugs usually only attack other insects, however if they are annoyed by a human, it will certainly try to bite you. And when they do bite, causes instant, and severe pain to whoever has been bitten. But it is not life threatening and should only cause temporary effects.

14. Cockroaches – California

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Cockroaches are fairly common, especially in cities or hot places. Most people have seen them, but occasionally they will bite humans. Apparently, they are particularly interested in feet and hands as well as fingernails and eyelashes. They are a huge pest in the US.

15. Tarantula Hawks – Nevada

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The Tarantula Hawks is one of the most poisonous insects in the world despite it looking fairly innocuous and harmless. And, if you are unfortunate enough to get bitten by a Tarantula Hawks, the pain is temporarily crippling but should not be long-lasting.

16. German Yellowjackets – Ohio

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Germa yellow jackets are a kind of dangerous insect which were accidentally brought to Ohio from Germany. They will nest anywhere, in rooves, in trees… and they will sting anyone in their way – multiple times over. This is why they have successful survived in the USA.

17. Botflies – New Hampshire

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Botflies may just look like the normal house fly, but it is certainly not. Their larvae burrows into skin and they live as a parasite in humas. They do this by laying their eggs in mosquitos. When we are bitten by mosquitos these can be transferred to the skin, where they then hatch.

18. Puss Caterpillars – New Jersey

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Puss Caterpillars may look fluffy, but it is not harmless. It is actually considered the USA’s most dangerous caterpillar. The hairs of the Puss Caterpillar can get in your skin and immediately cause a painful reaction, which can even be felt right down to your bones.

19. Kissing Bugs – Texas

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Kissing Bugs may have a sweet name, but they are anything but and are very dangerous. Many of them carry a certain parasite which can be lethal, over 50% of the kissing Bugs in Texas have it. The parasite is the reason for Chagas disease which can even lead to heart failure.

20. Browntail Moth Caterpillars – Maine

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Browntail Moth Caterpillars have poisonous hairs all over their little body which looks spiky in appearance. These hairs can spike into the skin and are toxic. They can irritate the skin and cause dermatitis, making the skin feel and appear red and irritated and itchy.

21. Asian Giant Hornets – Illinois

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These Asian Giant Hornets are the biggest and most dangerous off all hornets in the world and they can cause serious problems to people’s health. Its venom is so deadly that it can kill the red blood cells in a human’s blood which can then make the kidneys fail.

22. Ticks – Texas

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Ticks are so common but are undeniably one of the deadliest insects ever. They burrow into the skin, and they appear as a little hard covered lump on the skin. They carry numerous, debilitating and lifelong diseases and can cause diseases which may even lead to death.

23. Mosquitoes – Arizona

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Mosquitoes again are incredibly common but are very dangerous because of the diseases that they carry and spread to humans, for example, yellow fever, malaria, dengue. Over one million people die due to illnesses that they have contracted due to mosquitos – making them the deadliest of insects.

24. Centipedes – Connecticut

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Centipedes are not the deadliest of insects, but they are still dangerous. They can nip you, a little bit like a bee sting. This can make the area red and swell up and cause pain for a short period of time. However, the long-term effects are non-existent usually and so after a brief time the sting will fade.

25. Hobo Spiders – Utah

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Hobo spiders have also been nicknamed ‘the aggressive house spider’. They look just like the usual spider but are much more dangerous when they sting. They can headaches which last for a long time as well as joint and bone pain. They can even cause hallucinations, weakness of the muscles and pain.

26. Chiggers – Arkansas

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Chiggers are laid by trombiculid mites, you can’t see them with the naked eye, but they feed off human skin cells. Then, they irritate your skin and leave it red and inflamed. Chiggers are in a way even more unnerving due to the fact that they cannot be seen.

27. Asian Lady Beetles – Missouri

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Asian Lady Beetles are considered a pest in the USA, particularly in Missouri because there are now so many of them and they can cause pain and irritation. They bite, which is often fairly harmless, however, just a little bit irritating. It can sometimes cause a reaction which can cause pink eye.

28. Giant Resin Bees – Alabama

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Giant Resin Bees only tend to sting you if you have provoked them, like other bees. However, they are much bigger than the average bee, hence the name. And, due to the size of Giant Resin Bees, their sting is much more powerful and dangerous than usual bees.

29. Bald-Faced Hornets – Manhattan

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You absolutely do not want to disturb the nest of a bald-faced hornet. They can sting your multiple times over and actually squirt its poisonous venom into your eyes which may temporarily impair your sight and could blind you for a brief period of time.

30. Arizona Bark Scorpions – Arizona

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The Arizona Bark Scorpion is the most dangerous scorpion in the entire US and its sting is treacherous. The sting of the Arizona Bark Scorpions can create terrible pain and swelling, which can cause difficulty breathing and cause involuntary spasms in the muscles.

31. The Masked Hunter: Alaska

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This type of spider is a new level of scary based on the fact that it doesn’t just bite – it stabs you, with its beak. That’s right – a beak! The spider kills its prey – other insects and not us, luckily – by stab-stab-stabbing. To make this thing worse, it’s likely you could find them in your bed in this state if your bed has bed bugs – because bed bugs are a tasty meal for it. So wash your sheets. A LOT.

32. The Kissing Bug: Colorado

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Despite its name, there’s nothing romantic about this bug. The reason it’s called the kissing bug is because it choose to bite people around their mouths. If that wasn’t bad enough, it can also pass on a fatal disease by doing so.

33. Giant Water Bug: Delaware

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You know that fear most people have about going into water with bare feet because they think something unknown will get their toes? Yeah. That’s the giant water bug. These massive bugs are officially known as ‘toe-biters’, with large front legs they can use to grab their prey and bite it – which includes your tootsies.

34. Centipedes: Hawaii

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If you’re from other countries, you may have thought centipedes were quite harmless. But in Hawaii, they aren’t very popular with the locals. One of the three types of centipedes in this state is actually venomous if it bites you. It can also bite you hard enough to latch on and be difficult to get off.

35. Assassin Bug: Idaho

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The only applicable name for this particular bug, because it’s deadly and clever. The assassin bug has a curved beak which is a weapon all in itself, because it uses it to stab (repeatedly) its prey to immobilise it and then suck out the life from it. Yeah.

36. Blister Beetles: Indiana

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The blister beetle from this state is a greater risk for horses, but can also cause contact dermatitis in people. The reason it’s so bright is to tell people it’s poisonous (how kind of it) like many poisonous creatures, and it can mostly be found in tall grass.

37. Pelecinid Wasp: Iowa

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Any wasp is bad enough, but how about the most dangerous thing you can find in Iowa? The pelecinid wasp has a string which will be one of the most painful you could ever imagine. It’s also a threat to plants, which it targets by laying eggs hidden in soil and then burrowing in to consume them.

38. Yellow Jackets, Wasps: Kansas

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In this state, there are plenty of flying insects you should be wary of, and one of these is yellow jackets and hornets. Their stings are particularly problematic if you’re allergic – which means the worst kind could also be fatal. They can also get mighty aggressive.

39. Monarch Butterfly: Maryland

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You might never have expected a butterfly to be something to be wary of, but in Maryland, one of the deadliest things you can find is the Monarch Butterfly. Its striking orange colour works in the same way as poisonous creatures in that it’s so bright as a warning to stay away – because it’s toxic. Well, message received.

40. Brown Marmorated Stink Bug: Minnesota

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The name doesn’t sound too great either, does it? In Minnesota, you need to be wary of the brown marmorated stink bug, and it’s most often found on tall plants or even trees. It’s more likely to be found in something with height rather than plants on the ground.

41. The Eastern Velvet Ant: Mississippi

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Also known as the ‘cow killer’, and you can imagine why, this guy might look quite pretty with its striking red colour and vivid hairy body, but it’s very dangerous. And a lot of that is on account that it’s a wasp and not an ant, which carries a very painful sting.

42. Black And Yellow Garden Spider: Montana

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The only saving grace about this one from Montana is the ‘garden’ in its name, meaning you can hope to be safe in your home. Even though it’ll happily hang out in your garden, though, this black and yellow spider gets absolutely huge if it’s the female.

43. The Tarantula Hawk Wasp: New Mexico

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Everything about this name is terrifying – but it’s actually not what it seems. You may be worrying about being attacked by a tarantula sized wasp in New Mexico, but it’s named after the fact that it hunts spiders – including tarantulas. It has one of the most painful stings in the entire insect population.

44. Bold Jumping Spider: North Dakota

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We all know that ‘jumping’ and ‘spider’ should never be in the same sentence if you want to sleep at night, but unfortunately for our nightmares, they exist. This fella may look actually sort of cute, but in North Dakota, these hairy spiders can jump a distance 50 times that of their body length.

45. Fire Ants: Oklahoma

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The clue’s in the name for this one, with fire ants having a very, very painful venomous sting that feels like fire. They attack by biting the skin to get a good hold on it and then releasing the sting. You can expect a painful bump or, in worst cases, a severe allergic reaction.

46. Bald-Faced Hornet: Oregon

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This insect gets its name from the markings on its face, shown in a bold white hue, and this hornet builds its nest in trees. But it would have to be a big tree, because their nests can actually be as large as a basketball. They defend their nests aggressively, which is why you probably shouldn’t go near one.

47. Spotted Lanternfly: Pennsylvania

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It’s always the way that the most pretty insects can be the most deadly, isn’t it? The spotted lanternfly might look innocent, but it’s very dangerous, and very widely found in Pennsylvania. Their population is so bad for the environment that people are encouraged to kill them by crushing them.

48. Yellow Sac Spiders: Rhode Island

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If bitten by one of these pale yellow spiders, you can expect pain (naturally), itchiness and swelling at the sight of attack. These guys aren’t as bad as the infamous Black Widows or Brown Recluses, but they’re still pretty nasty if you don’t want to swell up.

49. American Oil Beetle: Virginia

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This huge beetle is kitted out with a very problematic chemical that it can spray at you. It’s likely to spray you if you make it angry, which is why it’s best to leave it alone if you spot one in Virginia. The chemical is cantharidin, which can result in skin blistering.

50. Mosquitos: Wisconsin

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It might be surprising to learn that mosquitoes are one of the most deadly insects in this state, because they’re well known for being problematic around the world, but maybe not as dangerous as some other creepy-crawlies. But you’re still at risk of being infected by a disease-carrying mosquito in Wisconsin.