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Invasive Joro Spiders Spreading Across Eastern U.S.

Experts say the large, brightly colored spiders pose little threat to humans but could impact native species.

Overview

  • Joro spiders, native to East Asia, have been moving north from Georgia since 2014.
  • They can survive in colder climates and have been spotted as far north as Maryland.
  • The spiders are venomous but not dangerous to humans or pets, causing only mild reactions.
  • Their ballooning travel method allows them to cover long distances quickly.
  • Researchers are monitoring their impact on local ecosystems, particularly native spider populations.