Joro spider identification. You can easily identify the big and colorful Joro spider in its adult form. The female Joro spider has blue-black and yellow stripes on its back and legs.

The female spiders can grow 2 inches in size, excluding the span of their striped legs. The females are yellow and typically live about a month.

Male Joro spiders are relatively small, with legs spanning less than an inch. The females, however, can be quite large, with one-inch-long bodies and legs that stretch up to four inches.