Giant, venomous spiders that fly through the air, known as Joro spiders, are expected to invade the U.S. Northeast via a technique called ballooning. While they are not harmful to humans, they pose a threat to other critters like butterflies and wasps.
Key Points
Joro spiders are native to East Asia and have been spotted in the U.S. since 2014
They have a leg span of up to four inches and the ability to fly using a technique called ballooning
The species is not harmful to humans but poses a threat to other critters like butterflies and wasps