3 min read

Mysterious Meat-Eating Worm Is A Living Glow Stick With Giant Jaws

<p><a class="checked-link" href="https://www.youtube.com/watch?v=u-gLxOanrfI" style="text-decoration: none;">Rainforest Expeditions/YouTube</a></p>

Although this worm looks as if it would be at home in the hands of a seasoned electronica enthusiast, it's actually a mysterious insect who lives in burrows in the dirt of the Peruvian Amazon.

Photographer Jeff Cramer first encountered these Day-Glo larvae several years ago, and he returned to the scene, along with three entomologists, this October.

(Rainforest Expeditions/YouTube)

The worms are young click beetles, according to the entomologists' best guess. (Cramer also canvassed Reddit/Whatsthisbug, which seems to agree with the beetle ID.) Their next question: Why glow, little worm?

(Rainforest Expeditions/YouTube)

Through a process known as bioluminescence, animals can produce chemical light. They use this light to achieve a variety of goals: to ward off predators, to act as decoys and to communicate. Fireflies, for example, light up their posteriors to find mates.

But other animals do not glow gentle into that good night. The ball dangling from an anglerfish's head, rich with glowing bacteria, is a source of fatal attraction. The anglerfish light beckons to fish in an otherwise inky sea, and curiosity kills - the fish are lured in and eaten.

Given that Cramer's worms had giant jaws (a sign of a meat-eating disposition), the entomologists believed the bugs' green glow might serve a similar purpose. To find out if the bugs were predatory, they offered up an ant to one of the worms. And, well, then this happened:

The worm's head peeks out of the center of the dirt, latching onto the ant. (Rainforest Expeditions/YouTube)

Entomologist Aaron Pomerantz explains the discovery in the video below:

(Rainforest Expeditions/YouTube)