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Common House Spiders: Here’s What you Didn’t Know

Ever heard of house spiders and what they are? There are many facts about spiders you probably didn’t know.

Spiders are arachnids related to mites, scorpions and ticks. There are thousands of species of them.

They are those we most commonly encounter indoors, so that’s how they derive their name.

There may be more nuisance from spiders’ webs than from the spiders themselves, and you can find them all over the world.

In this article, you’ll learn about facts about common spiders you probably didn’t know.

Are common house spiders beneficial to humans?

Many people widely accept that house spiders are beneficial to humans because they ingest poisonous spiders found in houses.

House spiders could either be arboreal (tree) or aquatic. Some spiders are common in areas with dry wood and soil, whereas we find others on moist parts of a house or building.

Most of them are active at night, primarily because they are the only creatures that can move through the dark.

They are tiny, about as large as a tick.

Although they cannot fly, they can swim and usually maneuver quickly through narrow and difficult-to-navigate spaces.

Spider species live in humid habitats, such as walls, ceilings, attics, and crawl spaces. Because they are primarily hunters, most house spiders hunt other animals or insects in their natural habitats.

Some house spiders, however, are pests by homeowners because they bite humans and other pets, and damage structures.

The benefit of house spiders

One benefit of having house spiders in your house is the protection it provides against insect bites. Spiders are one of the most common causes of allergic skin diseases.

Many people suffer from allergic reactions every time they come into contact with an infected spider or insect. Many insects that house spiders are attracted to are also pests.

This includes dust mites, roaches, and spiders, as well as other insects that are pests.

Types of house spiders

The two most common house spiders are black and brown. We commonly found these species in the United States.

There are about 900 types of house spiders. Of those, nearly two-thirds are toxic. While harmless, others can lead to severe medical conditions if they are biting or ingested. The medical conditions caused by spider bites include:

  • Nausea and vomiting
  • Headache
  • Difficulty breathing
  • Itchy skin rash
  • Increased saliva production
  • Droopy and swollen eyes
  • Sweating profusely

The female spider

The female house spider lays approximately 250 eggs in a silken sac that is round and brown. There may be over one sac on the web.

During the life of a female house spider, she may produce 17 sacs which contain up to 3,760 eggs. Approximately 7-10 days pass before the eggs hatch. Adults can live for a year or longer.

Not all house spiders are poisonous, but they are very dangerous. Two of the most dangerous house spiders are the black web spider, the tepidarium spider and the wolf spider.

Black web spider

You will find the black-web spider in the Midwest and southern states around the Great Lakes and Eastern Coast.

It has a body length of about five to six millimeters and is often mistaken for a wolf spider.

These spiders have venom that is five times more potent than that of a wolf spider. It injects a neurotoxin that causes neurological disorders and can even be fatal in rare cases.

Tepidarium spider

The tepidarium house spider is common near woodlands, marshes and swamps. They usually have brownish-colored abdomens and white undersides.

They have black, violin-like webs in which they spin their webs.

Wolf spider

The last type of house spider is the wolf spider. Wolf spiders do not have wolf spider bites and will not leave the victim with broken skin.

The bites of these creatures are seldom reported, and usually only when there is no other way for the victim to flee.

How can you protect yourself from spider bites?

To protect yourself and other members of your household from spider bites, you can do:

  • Apply a registered and quality insect repellent
  • If you live in wooden areas, it would be best to wear pants and long sleeve tops.
  • Treat your clothing with insecticide
  • Before wearing your hats, gloves or shoes, ensure to shake them
  • Let the firewood remain outdoors and only bring them into the house after you examine.

Conclusion

As previously mentioned, common house spiders prey primarily on tiny insects, such as moths, ants, and flies. These spiders leave the more significant, more challenging insects as they are too small to deliver a painful bite.

Their method of hunting is to pierce a fly’s skin with their front pair of appendages, inject venomous saliva, and then bite down to inject venom into the fly’s body. These bites can cause extreme pain and make them impossible to eat or move afterwards.

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