The caterpillar species with a macabre fashion sense was discovered by researchers in Hawaii. Its casing is a disguise to fool the spiders with which it lives.

Scientists in Hawaii have discovered a new, extremely rare species: carnivorous, bone-collecting caterpillars, that live in one 5-mile area on Oahu.

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.