UGA Cooperative Extension is a collaboration between UGA CAES and UGA FACS.

UGA Extension Office

Invasive Species Extension Newsletter

2025 Joro Spider Spotting Contest!

Report Joro spiders via 

JoroWatch.org

EDDMapS

EDDMapS  

  • When: October 6th, 12a - 12th, 11:59p 

Prizes for Reporters with verified, accurate reports.

  • Most reports
  • Most unique county
  • First Report in Georgia County 
  • Photo Contest winners


Invasive species resources - Joro Spider and Joro Spider Spotting Contest

Joro Spider (Trichonephila Clavata)

Large spider introduced to several eastern US states. The females are the most easily identifiable, especially as adults. Adult female bodies are up to 1.2 in long, and coloration is yellow with bluish-green bands on the top side of the abdomen. The belly is yellow and black with a red splotch at the end. Their legs are black with yellow bands, though rarely all black. Juvenile female coloration will depend on age/instar. They will be yellow, black, and white when small and young. When almost mature adults, they will be mostly yellow and have bluish-green splotches, not yet forming bands. Adult males' bodies are up to 0.31 in long, and they are brown with dark brown stripes.

Image: Rebekah D. Wallace, University of Georgia, Bugwood.org