How Dangerous Are Spiders


Spiders are arachnids, a class of arthropods that also includes scorpions, mites, and ticks. There are more than 45,000 known species of spiders, found in habitats all over the world. There’s a spider with a cartoonish butt, spiders that can jump on demand, and cannibal spiders that look like pelicans.

Spiders range in size from the tiny Samoan moss spider, which is .011 inch long, to the massive Goliath birdeater, a tarantula with a leg span of almost a foot.

Harmful Spiders?

For most people, the thought of spiders conjures up images of tarantulas, wolf spiders, and other (seemingly) fearsome creatures. Though all spiders have venom to one degree or another, only a handful are dangerous to humans. Those include the black widow and the brown recluse, both found in the United States.

The vast majority of spiders are harmless and serve a critical purpose: controlling insect populations that could otherwise devastate crops. Without spiders to eat pests harmful to agriculture, it’s thought that our food supply would be put at risk.

How Deadly Are Black Widow Spiders?

The black widow spider lives up to its reputation as one of the most dangerous spiders to humans. It is also the most venomous spider in North America. A bite can be painful and debilitating, and often causes pain in your chest or abdomen. Other possible black widow spider bite symptoms include:

  • Headache
  • Anxiety
  • Painful, cramping muscles
  • Numbness
  • Nausea and vomiting
  • Light sensitivity
  • Heavy sweating and salivating

If you have many of these symptoms, you are suffering from what scientists call latrodectism, the illness caused by black widows and related spiders.

How Dangerous Is the Brown Recluse?

The only other spider in North America that poses a medical danger to humans is the brown recluse. If you live in the American Midwest, chances are you live side-by-side with many of these tiny spiders. Even so, your chances of being bitten are slim. That’s because they rarely bite humans.

Although the risk of being bitten is low, these are potentially dangerous spiders. However, no deaths have been reported in the United States. Even if you aren’t killed by the spider, their bites can be extremely painful and scarring.

How to Avoid Spider Bites?

11 tips for avoiding spiders

  • Maintain a clutter-free environment.
  • Avoid stacking wood and separate it carefully if you do.
  • Wear long sleeves, long pants, and covered shoes in areas where spiders can hide.
  • Make a habit of wearing shoes or slippers.
  • Shake out clothing, blankets, and shoes before you use them.
  • Check crevices, boxes, and containers before sticking your hand in them.
  • Use tightly sealed plastic bags to store tools and other items.
  • Be cautious and aware around stone walls.
  • Seal entries in walls and the floor.
  • Use insecticides or peppermint oil around nooks and crannies.
  • Spray peppermint oil in a carrier oil in shoes, on clothes, and across bedding.
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Special Features:

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4. The bug catcher vacuum is equipped with a led light to catch the dark crawlers

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Davis, C. P. (2022, January 10). Spider Bites: How to Identify What They Look Like and Treatment. On Health.

Leavitt, J. (2021, March 31). How to Treat a Spider Bite at Home Naturally. Healthline.

National Geographic. (n. d.). Spiders. Retrieved February 16, 2022, from