A newly discovered carnivorous caterpillar, found only on the island of Oahu, has drawn attention from scientists due to its bizarre survival method. The species, recently featured in the journal Science, was given the name “bone collector” due to its strange behavior of adorning its silk case with the remains of its prey. This insect feeds on creatures trapped in spiderwebs and is believed to use the remains of ants and flies as camouflage. Experts suggest this helps the caterpillar remain unnoticed while stealing the spider’s food. Researchers from the University of Hawaii at Manoa reported that only 62 of these caterpillars have been identified over more than 20 years, emphasizing their rarity. The bone collector belongs to a group of native Hawaiian caterpillars that often use natural materials like sand and lichen for protection, but this one stands out for using animal remains.

The caterpillar’s behavior highlights an extraordinary evolutionary strategy that has lasted over 6 million years. According to scientists, this predatory insect is older than the Hawaiian islands themselves. It lives in a small area of mountain forest that is now under threat from invasive species. The discovery has led to increasing concern among conservationists. One entomologist called the caterpillar’s case “astonishing,” and specialists agree that such a remarkable species must be protected. The study highlights the ecological importance and delicate nature of island ecosystems. Researchers describe the bone collector as both fascinating and alarming, stressing the urgent need for biodiversity preservation.