Joro spider spotted in Boston for first time. What to know about the huge, flying spider
When the spiders hatch in the spring and early summer, the small spiders create a balloon of silk to travel on. It's not an uncommon trait for web spiders, but Joro spiders make their leap from an elevated spot and if they catch the right wind are capable of moving more than 100 miles. That is also why they can spread so far.