Joro spider invasion grows in US; should you be worried?
Joro spider invasion grows in US; should you be worried?
US · Published Mar 24, 2026
The Joro spider, an invasive species from Asia, is spreading across the US, having been spotted in at least eight states.
Despite their large size, experts say Joro spiders are non-aggressive and pose little threat to humans.
Researchers are studying the long-term effects of Joro spiders on native species and ecosystems to determine if management strategies are needed.
Joro spider's increasing prevalence across United States
The Joro spider, an invasive species known for its impressive size (reaching up to the span of a human hand), is increasingly prevalent across the United States. Since 2021, it has been identified in at least eight states, marking a significant expansion of its territory.
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