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When it comes to identifying Joro spiders, let’s just say that once you’ve seen one, they’re hard to forget. There are many remarkable facts about this spider, including its size and the size and design of its web.
Keep reading to learn the answer to the question: How big are Joro cobwebs? In addition, find out some facts about where this insect lives, why it is considered an invasive species and why it is sometimes called a golden one orb weaver.
What is a Joro spider?
Joro spiders are large insects three to four inches long. They have eight spindly legs. A good size comparison is that this spider is about the size of an adult’s palm. Female Joro spiders have yellow and blue bands on the top of their bodies and yellow and black parts on their legs. The underside of a woman’s body is a combination of red, yellow and black designs. Males are much smaller in size than females and are brown in color. This makes male and female identification easy with this spider species.
The Joro spider is native to China, Japan, Korea, and Taiwan. They are also known as East Asian Joro spiders. However, many of these spiders now live in North America. In particular, there is a large population of them in Georgia. These spiders are considered invasive species in North America. This therefore begs the question: how does the East Asian spider ends up in the state Georgia?
How did the Joro spider become an invasive species in Georgia?
The truth is, scientists can only guess how the Joro spider got to Georgia. An official at the Georgia Museum of Natural History theorizes that this spider traveled from its native country to Georgia via a shipping container. The stowaways began to settle in the habitat and reproduce. Thus, the population of this invasive species grew in the state.
Is the Joro Spider good for the environment in Georgia?
Some invasive species deprive native species of food and harm the environment. But the Jorospin has some positive effects on its habitat in Georgia.
For starters, Joro Spiders are one of the few insects that eat stink bugs. These insects can damage or kill crops. Joro spiders also catch mosquitoes, to fly, and other pests in their bulb web. So they don’t seem to reduce the food supply for other species of spiders native to Georgia.
Where do these spiders spin their webs?
A Jorospin can build a web in bushes or between two trees that are relatively close to each other. In Georgia, a homeowner can Joro spin build a web in a corner of a porch or on part of a swing.
Like most spiders, Joro spiders build their webs in a spot with a fair amount of airflow. This location makes it more likely for insects to get trapped in the web. Also, a Joro spider can build a web near a porch light or a light somewhere on the property of a house. Many insects are attracted to light. So by making a web near a light, this spider increases its chances of catching prey.
How big are Joro cobwebs?
One of the most incredible facts about this spider is the size of its web. A Joro spider web can be up to three meters wide! By comparison, a ten-foot web is the same length as half an adult giraffe.
This insect builds a so-called bulb web. That is why it is sometimes called a orb weaver. The web consists of a series of spheres or spirals. The sphere or spiral part of the web is attached to the trees or shrubs around it with mooring lines. This is so the web doesn’t collapse or blow away. Knowing what type of web a spider makes can help you with its proper identification.
In a size comparison with the web of a common house spider, the Joro spider web becomes the winner. The web of a common house spider is an inch or less wide. In fact, the bodies of the most common house spiders are only half an inch to an inch long. Their webs are so small that they are practically invisible unless someone inspects the corner of a room. But when you think about it, the size comparison results between these two cobwebs make a lot of sense. A large spider, such as a Joro or even a baby Jorospin, is more likely to have the strength and energy needed to build a larger web.
What is unique about a Joro spider web?
Together with its intricate sphere design, the wires of a Joro spin web are yellow or gold. If you study this silk web in the sunlight, it is an even brighter shade of gold. Almost sparkling!
This insect belongs to the Nephila genus of spiders sometimes referred to as golden silk orb weavers.
Do Joro spiders have their young in their web?
Yes. In the autumn season, a female Joro spin can lay 1000 or more eggs in an egg sac. The egg sac is light brown in color and at least an inch long. It is usually located in a corner or edge of the web. If the web is connected to tree branches, the female can place the egg sac under a collection of leaves. Or, if the female’s web is under the eaves of a house, she will likely place her egg sac in a corner of the soffit. If you look at the eaves on the side of a house, the soffit is at the bottom of an eaves. The female wants to put her egg sac in a place where she is protected against wind and weather.
What happens to a baby Joro spider?
Once the egg sac hatches in the spring, the baby Joro spiders, also known as hatchlings, can live independently. They find a new place to live by ballooning to a new habitat. Ballooning is when a spider travels through the air using a silk thread. The balloon activity of Joro spider babies is how these spiders spread to different locations in Georgia.
Some entomologists have predicted that Joro spiders will appear in other states near and outside Georgia.
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g flies, and even brown marmorated stink bugs!
Are Joro Spiders Poisonous?
Yes. But one bite of a Jorospin is not dangerous to a human unless the person is allergic to it. The pain level of a Joro spider bite is approximately equal to a bee sting. This is probably because it is larger than most spiders. The bite area will likely become irritated and red, and some blisters may form.
What should be done to treat a Joro spider bite?
If the bite area becomes infected or if a rash develops, it is best to have it looked at by a doctor. Otherwise, wash the bite area with soap and water, then dry thoroughly. If there is pain or soreness, gently place an ice pack on the area.
Are Joro spiders aggressive?
The large size of a Joro spider may make it seem a little more menacing than other types of spiders. This would be especially true for a Georgia homeowner who sees himself building a web nearby. But these spiders are not aggressive. If a person were bitten by this spider, it would likely only happen if the spider was at risk of injury. For example, if a person accidentally walks into the spider’s web, the spider may feel trapped and bite as a way to protect itself.
The best way to get to know and study these spiders is to observe them without touching their webs. Like most other animals, they want to be able to go about their daily activities undisturbed.
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