Millipedes might soothe itchy lemurs, research finds

Millipedes might soothe itchy lemurs, research finds

Pesky itchiness caused by parasitic worms may have driven one of Madagascar’s lemur species to come up with a natural remedy.

New research, published July 30 in the journal Primates, suggests that red-fronted lemurs (Eulemur rufifrons) apply millipede secretions to parts of their bodies, a process called “self-anointment.”

“Self-anointment combined with eating millipede secretions may be a way of self-medication by red-fronted lemurs,” Louise Peckre, a primatologist at the Leibniz Institute for Primate Research in Göttingen, Germany, and the study’s lead author, said in a statement.

Millipedes might soothe itchy lemurs, research finds
Banner image of a red-fronted lemur by Surrey John (CC BY-SA 4.0), via Wikimedia Commons.
176796 web
A red-fronted lemur in Kirindy Forest. Image by Louise Peckre/Leibniz Institute for Primate Research.

In 2016, Peckre was in the midst of several months of field observations of red-fronted lemurs, a near-threatenedspecies according to the IUCN, in central Madagascar’s Kirindy Forest, when hordes of millipedes exploded from dormancy. Kirindy is dry most of the year, but during the Southern Hemisphere’s summer, it gets hot and rainy for a few months. This first substantial rain of the season probably spurred the appearance of the millipedes.

Right after this happened, Peckre watched as six lemurs, from two different groups, made apparent use of the bounty. A lemur would grab a millipede and chew part of it, creating an orange substance as it mixed with saliva. The lemur would then rub its fur and the area around its genitals, including the anus. Then it would bite the millipede again and repeat the sequence, typically switching the hand it held the millipede in, back and forth. Sometimes, though not always, the lemur would then eat the millipede.

Researchers think that self-anointing, which other animals also do, might be a form of communication. But in this case, the authors report that members of the self-anointing lemur’s group, who were close by, didn’t pay much attention to the process. And it didn’t appear that the millipede was a favorite source of food, either.

1024px Enterobius vermicularis
Eggs of a pinworm, a nematode in the Oxyuridae family. The parasites that infect red-fronted lemurs are also members of Oxyuridae. Image by DPDx, PHIL (Public domain), via Wikimedia Commons.

Evidence from Peckre’s observations did indicate that the lemurs using the millipedes had afflictions that they were trying to treat.

“Strikingly, during the fur-rubbing observations, we noticed the presence of bald areas on the lower back of many animals,” Peckre said. These are known as sit spots, and are likely caused by frequent scratching, she added.

“These bald areas may then indicate the presence of infections by Oxyuridae” — a family of worms — “in the population at the time,” Peckre said.

Pinworms, which can cause anal itching in humans, are also members of the Oxyuridae family.

Eulemur rufifrons Kirindy Madagascar
Red-fronted lemurs in Madagascar. Image by Jialiang Gao (CC BY-SA 4.0), via Wikimedia Commons.

Peckre and her colleagues hypothesize that the external application of the millipede secretions could be both atreatment for current infections and protection against others. Millipedes harbor a host of compounds to make them less desirable as prey, including benzoquinone, a chemical that keeps mosquitos away and kills bacteria.

Other research suggests that benzoquinone could slow the growth of parasites in the intestine, which might be why the lemurs occasionally ate millipedes that they had first used to treat themselves externally.


Peckre, L. R., Defolie, C., Kappeler, P. M., & Fichtel, C. (2018). Potential self-medication using millipede secretions in red-fronted lemurs: combining anointment and ingestion for a joint action against gastrointestinal parasites? Primates, 1-12.

This article was written by John Cannon and first published by on 13 Aug 2018.


Subscribe to our FREE Newsletter


Dive in!

Discover hidden wildlife with our FREE newsletters

We promise we’ll never spam! Read our Privacy Policy for more info


Founder and Executive Editor

Share this post with your friends

Leave a Reply

Notify of