What is the name of the newly discovered carnivorous caterpillar that wears the leftover body parts of its prey as camouflage?

The newly discovered carnivorous caterpillar that employs a gruesome yet effective camouflage technique is aptly named the "Bone Collector." This unique insect, found on the Hawaiian island of Oahu, stands out because it not only preys on other insects but also meticulously adorns its silken, portable case with the leftover body parts of its meals. Researchers observed these caterpillars attaching various insect remains, such as fly wings, weevil heads, and earwig abdomens, to their cases, creating a macabre suit of armor.

What makes the Bone Collector truly extraordinary is its unusual habitat and diet. Unlike most caterpillars that are herbivores, this species is carnivorous and lives within spider webs. It opportunistically feeds on insects that have been caught and weakened by the spider, sometimes even chewing through the silken webbing to reach its prey. The "bone" collecting behavior serves as a clever form of disguise; by decorating its case with insect detritus, the caterpillar is thought to appear as harmless leftovers to the host spider, allowing it to feast undetected within the spider's own hunting grounds.

Discovered by scientists at the University of Hawaiʻi at Mānoa, this caterpillar belongs to the genus Hyposmocoma, a diverse group found only in Hawaii. Its lineage is estimated to be at least six million years old, making it significantly older than the current Hawaiian islands. Despite its ancient roots and fascinating adaptations, the Bone Collector caterpillar is already endangered, found only in a small forest area on Oʻahu, highlighting the ongoing need for conservation efforts to protect such remarkable species.