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Hawaii's "bone collector" caterpillar wears body parts of dead prey

Hawaii's "bone collector" caterpillar wears body parts of dead prey

Scientists have discovered an unusual carnivorous species of caterpillar that lives in a macabre manner. They have named it "the bone collector" and found that the area is remote, lushly covered with trees on Oahu Island.

Researchers said that the caterpillar scavenges trapped and helpless insects such as beetles and flies. The clever caterpillar hides its body in a silk case that it makes and decorates with non-edible parts of the insects it has collected. This is how it avoids the spiders, who would love to eat it.

This caterpillar will eventually metamorphose into a moth, which is brown and white in color. The larval form of the moth is the caterpillar, which has a worm-like segmented body.

According to Daniel Rubinoff of the University of Hawaii at Manoa, professor of entomology and the lead author of this study, published in Science journal this week, the caterpillar is the only one known to benefit from spiders and live with them.

Its gruesome behavior seems well-suited to a crime novel. It is a great example of how our planet's organisms are creative in their ways to survive and flourish.

Rubinoff explained that spiders need to be hidden in a tapestry made of insect parts in order to survive in their lair.

Rubinoff stated, "I believe it is a real hero." "It lives in the lion's roar, hiding with a spider to get food and shelter. The caterpillar attacks prey who can't escape, but it is also very slow and bumbling. It trails a large case (of silk) behind it.

Spiders spin webs in hollows of trees and rocks, where they catch caterpillars that eat insects.

Rubinoff explained, "It's likely that it's getting leftovers from the spider after they have fed."

Even worse, they cannibalize other caterpillars from the same species.

The "Bone Collector", a nickname for a serial killer, was used in Jeffery Deaver’s 1997 novel The Bone Collector and the 1999 film with the same title.

How did this caterpillar get its infamous nickname?

"I believe the term is in the air and fits with what these caterpillars do." Rubinoff explained that the term is a little tongue-in-cheek because arthropods do not have actual bones.

Arthropods is the collective name for invertebrates, which includes insects, spiders and crustaceans.

Researchers said that the "bone-collector" lives in a small patch of forest covering only 5.8 square miles (15 sq km) within the Waianae Mountain Range. Rubinoff stated that this caterpillar lives a precarious life. In two decades of fieldwork, only 62 individuals were observed.

"Invasive species pose the greatest threat today." Hawaii's native species are disappearing even in protected areas due to invasive plants taking over habitats. They turn them into bio deserts, which look like forest but are not accessible to native species," Rubinoff stated.

The caterpillar is part of a group called Hyposmocoma, which includes hundreds of species native to Hawaii and evolved about 12 million ago. Researchers believe that the "bone-collector" is a descendant of a lineage dating back more than five million years.

Most caterpillars feed on plants. Globally, predatory caterpillars make up less than 0.13 % of the nearly 200,000 species of moths and butterflies. The "bone collector", which is unique to the animal world, is the only known creature that can find food in the manner it does.

Rubinoff stated that the more we understand the world, the better we will do.

(source: Reuters)