Living within about six square miles on the island of Oʻahu, scientists say the bone-collector caterpillar may be one of the strangest and most threatened species ever found

The discovery of the bone collector species was serendipitous. "You never forget your first bone collector," Rubinoff told Ars. His team was on Oa'hu looking for Hyposcoma when they came across a little tree hollow and spotted something at the bottom that at first glance just looked like "a bag of bug bits.