The invasive Jorō spider, rapidly spreading across the southeastern United States, has exhibited unexpected adaptability to urban environments, according to a recent study published in Arthropoda on February 13. Unlike typical spiders that find noise and wind disturbance from busy roads stressful, Jorō spiders seem unaffected, making them well-suited for thriving in urban areas.
Lead study author Andy Davis, a research scientist at the University of Georgia’s Odum School of Ecology, noted that Jorō spiders can be found on power lines and stoplights over busy roads, showcasing their ability to endure the challenges posed by urban settings.
Jorō spiders, also known as Trichonephila clavata, were first observed in the United States around 2013 and have since spread across the southeastern states. Growing up to 4 inches in length, these orb-weaving spiders catch prey using their large, three-dimensional webs. The recent study conducted over 350 tests on spiders across 20 roads revealed that Jorō spiders near busy roads were only slightly less likely to attack simulated prey than those in less busy areas.
Urban habitats, especially those with lights nearby, attract Jorō spiders, making them surprisingly tolerant of the urban environment. The researchers highlighted the species’ unique ability to endure stress, both behaviorally and physiologically. Future studies aim to delve into the physiology of Jorō spiders and their response to stress.
While the Jorō spiders are currently not causing a negative impact, their rapid multiplication could potentially displace native spiders as they compete for the same insects. Despite being venomous, their fangs cannot break human skin, and it is recommended to leave them undisturbed. The Jorō spiders play a role in controlling various insect species, making them valuable components of the ecosystem.
