Strange Worm Towers Hitchhike on Beetles in Wild First
Researchers just spotted a bizarre behavior in nature. Hundreds of tiny worms formed writhing towers together. Scientists had never seen this in the wild before. They only observed it in labs. These worm towers hitchhiking beetles may solve a long mystery. The worms likely use the beetles as traveling taxis. A new study from the Max Planck Institute reveals the secret.
How the Discovery Unfolded
In 2025, a team studied rotting fruit in German orchards. They saw worms stretching upward into towers. Later, they recreated the behavior in the lab. The towers could cling to fruit flies. However, researchers still didn’t know which animal helped them in the wild. Then they examined hundreds of invertebrates. Only two invasive beetle species carried large worm clusters. Genetic tests identified a new species: Caenorhabditis apta.“It’s fascinating that C. apta prefers just these two beetles,” says Dr. Ryan Greenway. One beetle came from North America. The other arrived from the western Pacific. Both reached Europe in the early 2000s. The new nematode appeared in European collections only after 2010.
Why This Matters for Ecosystems
Nematodes are the most abundant animals on Earth. Many hitchhike on larger animals called vectors. However, scientists know little about these relationships in nature. This discovery may explain how C. apta entered Europe. It could also affect local orchards. The nematode might influence fruit breakdown or food webs. In addition, researchers might find ways to use C. apta against crop pests. “We know surprisingly little about nematodes in the wild,” says Dr. Serena Ding. “This study shows what we can learn by observing them in nature.”
