The invasive joro spider has been spotted for the first time in Pennsylvania.
Six of the giant, colorful spiders, which were already spreading across north-east states including New York and New Jersey, were seen in the yard of a home in Bucks county on 5 September, according to the interactive tracking system JoroWatch. A state entomologist then visited to confirm the location and identification.
The species, Trichonephila clavata, is native to east Asia, primarily Japan. It measures up to 4in (10cm) with legs as long as 8in (20cm), and can spin large, golden webs up to 10ft (3m) wide.
Females can be identified by their yellow abdomen and broad blue-green bands on their back, as well as yellow and red markings on their belly, according to JoroWatch. They also have long black legs that are often striped in yellow bands.
Males are smaller, and mostly brown, with two long yellow stripes on both sides of their abdomen and a dark brown stripe in the middle.
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