With the quickly expanding range of Joro Spiders in the United States you may have recently seen a spider and suspected it might be a Joro. In this article, you will learn what a Joro spider looks like and how to identify them.
How to Identify a Joro Spider?
Joro Spiders are known for their large golden colored webs that can be up to 10 feet wide. These webs can be found suspended between two or more objects, such as trees, eaves on building, mailboxes, or just about thing sturdy enough to hold the web. Adult Joro Spiders are usually first identified by their large size and bright yellow markings. Learn below how to spot these markings on male and female Joro Spiders.
What do Female Joro Spiders Look Like?
Female Joro Spiders are larger than males, and can have a leg span of up to 3 or 4 inches. The top of the abdomen of a female Joro will be bright yellow with grey-blue bands. The bottom will have a large red mark surrounded by yellow line patterns, and the legs are black with thick yellow bands.
What do Male Joro Spiders Look Like?
Male Joro spiders can easily be confused with other spiders because they are much smaller and lack the bright colors of the female. Male Joros have a leg span of about 1.5 inches and a body length of .3 of an inch. Their body is light brown with dark brown stripes.
What do Baby Joro Spiders Look Like?
Typically baby Joro Spiders, also called a Spiderling, looks like miniature versions of the adult Joro Spiders. They are very small with less than a half an inch leg span. Depending on their age they may have a yellow and black spots on their abdomen and bottom. Usually they have not yet developed the red mark on their bottom.
Reference List:
National Library of Medicine. (2015, February 5). Nephila clavata L Koch, the Joro Spider of East Asia, newly recorded from North America (Araneae: Nephilidae). https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4327315/
Royal Entomological Society. (2022, February 17). Physiological evaluation of newly invasive jorō spiders (Trichonephila clavata) in the southeastern USA compared to their naturalized cousin, Trichonephila clavipes. https://resjournals.onlinelibrary.wiley.com/doi/10.1111/phen.12385
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