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Invasive Joro Spider Spotted in California; Experts Monitoring Spread

4/13/2026

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Summary

Story summary

The Joro spider, an invasive species from East Asia, has been spotted in Santa Barbara County, California.
The spider can grow up to 1.25 inches and disperses by ballooning.
Experts believe it arrived in the United States via shipping containers.
The spider poses no danger to humans.
Researchers will monitor its spread and its potential impacts on native species.

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Story summary

The Joro spider, an invasive species from East Asia, has been spotted in Santa Barbara County, California.
The spider can grow up to 1.25 inches and disperses by ballooning.
Experts believe it arrived in the United States via shipping containers.
The spider poses no danger to humans.
Researchers will monitor its spread and its potential impacts on native species.