male

The butterfly, known as Lexias pardalis, had half its body covered in markings typical of the male of its species and half covered in female markings. "I thought: 'Somebody's fooling with me. It's just too perfect,'" said Chris Johnson, the volunteer who made the discovery while working on the Academy's Butterflies! exhibit. "Then I got goose bumps."

"It slowly opened up, and the wings were so dramatically different, it was immediately apparent what it was," he added, according to a statement about the discovery released Tuesday by Drexel.