joro spider in web

The Joro Spider is a species of orb-weaver spider that has recently made headlines as it’s been spotted in several states across the eastern United States – including, yes, here in Long Island. The Joro Spider isn’t your typical garden spider. They are large, vibrant, and appear menacing. What could this new spider be? Is it possible that you have come across the Joro Spider? In this blog, we will provide answers to the mystery of this fascinating newcomer. Should any pests become problematic to your property, Arrow Exterminating is here to help. 

What Does the Joro Spider Look Like?

The Joro Spider stands out for several reasons. It’s a large, vibrantly colored spider with a massive web. Seeing a large Joro usually means it is a female, as the spiders exhibit sexual dimorphism. This means that the females and meals vary in appearance from one another. 

Here’s how to tell male and female Joro spiders apart:


  • Size: Much smaller than females.
  • Color: Darker, less vibrant, with more subdued colors.
  • Web: Does not build webs as females do.


  • Size: Large, with a body length of about 0.75-1 inch and a leg span of up to 4 inches.
  • Color: Bright yellow and blue body with distinctive red markings.
  • Web: Builds large, intricate webs that can span up to 10 feet.

The Joro Spider web is also distinct, as they are large, strong, and golden. The webs can trap a variety of insects. 

Where is the Joro Spider Found?

The Joro Spider has been noted for its adaptability as it has been found in various locations. Not just found in large natural areas, they are revealed to live and thrive in urban areas. They’ve even been noticed increasingly near highways, which is highly unusual for a web-hunting spider that relies on vibrations to capture prey.

Their ability to thrive in different environments, including urban areas, underscores their versatility and potential for wider spread.

Is the Joro Spider Dangerous?

Despite their daunting size and appearance, Joro spiders are generally not a threat to humans. While capable of biting, their fangs are small and they are overall timid creatures that prefer to retreat when confronted. The fear they might instigate is far greater than the actual risk they pose, making them more of a curiosity than a concern.

Where Did the Joro Spider Come From?

The Joro Spider is native to East Asia. It’s believed that they were accidentally transported to the U.S. via shipping containers. This theory explains their initial appearances near ports and their subsequent spread across the eastern United States.

What’s Next for the Joro Spider in Long Island?

As stated above, the Joro Spider is incredibly adaptable and has success at breeding. With this in mind, they will likely spread across the eastern seaboard. For those who don’t care for spiders, this news might be unwelcome, however, they are spiders that should not cause you to worry about your safety. 

Got Questions About Spiders?

While the Joro Spider might initially inspire fear due to its size and unfamiliar appearance, it’s important to remember that they are largely harmless to humans. Their presence in Long Island and beyond is a testament to the ever-changing tapestry of our local ecosystems. 

However, if you have concerns or questions about the Joro Spider or any other pests, remember, we’re here to help. Call us anytime for advice, information, or assistance dealing with pest-related issues.

The Joro Spider and Long Island. What to Expect. Serving Long Island and surrounding areas

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