Joro spiders invade Georgia and Pennsylvania, spreading rapidly

The Joro spider, an invasive species native to Asia, has been confirmed in Pennsylvania after being first spotted in Georgia around a decade ago. An entomologist verified the presence of adult Joro spiders in Bucks County, Pennsylvania, following reports of six sightings on September 5. This species is known for its ability to travel through the air by shooting out long strands of silk, which has led to its rapid spread across various states in the U.S. Joro spiders are characterized by their large webs, which can reach up to 10 feet in diameter. Female Joro spiders are approximately one inch long and are easily identifiable by their yellow and gray abdomens. They can produce egg sacs containing 400 to 500 eggs, contributing to their population growth. Males, on the other hand, are significantly smaller, measuring less than half an inch. Since their introduction to the U.S., Joro spiders have expanded their range across the South and are now reported in over seven states. Experts initially estimated that it would take around 35 years for them to reach southeastern Pennsylvania. However, they noted that human transportation could accelerate their spread to new areas. Despite their venom, Joro spiders pose minimal threat to humans, as their bites are less painful than a bee sting and typically result in only minor localized pain and redness. As they continue to spread, understanding their behavior and impact on local ecosystems will be crucial for managing their presence in new regions.