The first thing you notice is the sound. Before you see anyone, before the forest even fully reveals itself, the air trembles with the rustle of leaves, the soft clack of branches, the far-off whoop of a chimpanzee calling to another through the green distance. Morning light filters in thin, golden shafts through the canopy in Uganda’s Budongo Forest, and it smells of damp earth, crushed leaves, and the faint sweetness of distant blossoms. Somewhere ahead, a small group of researchers stands very still, binoculars lifted, holding their breath. Because today, again, the chimpanzees are doing something nobody expected.
A Quiet Forest, A Startling Gesture
In the filtered light of the undergrowth, a female chimpanzee sits on a branch, her weight swaying the young tree in slow, deliberate arcs. She is not feeding, not grooming, not playing. Her attention is fixed on a small wound on the foot of her juvenile son. The cut is fresh and red against his dark skin, probably from a sharp twig or poorly placed step on the forest floor. But what happens next is what will eventually ripple far beyond this forest—and into scientific journals and ethical debates.
Observers watch as the mother places her lips near the wound, not to nurse it with a kiss or lick it clean, but to carefully apply something small and dark that she appears to have just plucked from the air or bark: an insect. She presses it gently into the wound, then uses her lips and fingers to spread it across the surface. The juvenile winces but doesn’t pull away. He seems to accept it as if this is simply what one does, as familiar to him as a mother’s touch.
For a moment, even the forest seems to still. Later, the researchers will whisper excitedly about what they saw, comparing notes, video, and memory. But in that moment, among the towering mahoganies and the low buzz of forest life, the scene belongs entirely to the chimpanzees.
The Study That Started With Curiosity
The discovery emerged from years of patient observation in Budongo, where scientists follow identified individuals through the forest, tracking not only their movement, diet, and social lives, but subtle quirks of behavior—things that, until a pattern appears, can look like simple oddities.
It began with a single, fleeting observation: a chimp using an insect on its own wound. Interesting, yes. Surprising, certainly. One-off behaviors like that do surface from time to time in wild primates—creative moments that never catch on with the group. But then it was seen again. And again. Different individuals, different days, the same striking pattern: a chimp catches or plucks an insect, immobilizes it, and then places it deliberately on an open wound, sometimes their own, sometimes another chimpanzee’s.
It was the “sometimes another chimpanzee’s” that raised the hair on the back of the researchers’ necks. This wasn’t just potential self-medication, which has been seen before in other animals. It looked very much like a form of first aid.
What Exactly Are the Chimps Doing?
Across many recorded events, the sequence often followed a similar pattern. A chimpanzee with an injury would either notice the wound itself or have it noticed by another chimp. Then, three key steps:
- Catching an insect: The chimp would snatch a flying or crawling insect from the air or a nearby surface. The specific insect species are still under investigation, but they tend to be small, manageable, and easy to handle.
- Immobilizing and applying: Using lips and sometimes fingers, the chimp appears to crush or at least subdue the insect, then carefully press it onto the wound.
- Spreading and checking: The insect is moved around the wound area, as though spreading a substance—perhaps its internal fluids—over the injured skin.
This is not frantic, random behavior. It is calm, systematic, and oddly familiar if you’ve ever dabbed ointment on a child’s scraped knee. Some individuals repeat the application multiple times. Sometimes, an uninjured chimp performs the action on another’s wound, focusing intently as if they understand that what they’re doing matters.
Listening to the Forest’s Quiet Experiments
Long before we named medicines and branded pills, animals were conducting their own messy, slow-motion experiments in survival. The scientific term for this is “zoopharmacognosy”—the way animals appear to self-medicate with plants, soil, or other natural substances. We’ve known for years that some chimpanzees swallow bitter leaves whole to purge intestinal parasites, and other species—from birds to elephants—seek out clays or plants that ease digestion, fight infection, or repel parasites.
Yet insects are a different story. The idea that a primate might capture an insect not just as food, but as a tool—applied externally to an injury—is startling. What is in these insects? Are they antibacterial, anti-inflammatory, or simply soothing due to their texture or moisture? Or is the effect partly symbolic, a learned ritual that persists because it feels effective enough?
Researchers are now taking every ethically possible step to understand the biochemistry behind this behavior without disrupting the chimpanzees’ lives. When they can, they collect remains of similar insects in the area and test their properties: Do they secrete compounds that inhibit bacteria? Do they contain analgesic chemicals that might dull pain? The forest, it seems, is not just a backdrop to chimpanzee life. It is a pharmacy—and the chimps may be more adept pharmacists than we realized.
How This Behavior Was Documented
Over months and years, details started to accumulate like puzzle pieces. Technicians sifted through video footage, taking note of the angle of the chimps’ fingers, the expression on their faces, the reactions of the wounded individuals. Each observation was carefully logged: who applied the insect, who was injured, what kind of wound it appeared to be, and how long the interaction lasted.
Eventually, the data reached a critical mass. This wasn’t a fluke. The pattern was clear enough to describe in a scientific paper, but the experience of watching it, day after day, was more than a dataset. For the people there on the forest floor, it was quietly life-changing.
Imagine leaning against a tree trunk, sweat trickling down your back in the thick humidity, trying to hold your binoculars steady as mosquitoes whine around your ears. It’s early afternoon, the forest is alive and, simultaneously, deeply hushed. In a small clearing ahead, two chimps huddle together. One has a gash on the arm. The other reaches out, catches an insect, and with obvious concentration, begins the same ritual you’ve now seen multiple times. The beam of your camera wobbles for a moment—not because you’re tired, but because you’re suddenly aware you might be witnessing the edge of something we’ve scarcely understood: empathy, care, and medical intervention in another species.
The Emotional Weight of Chimpanzee First Aid
There’s a danger, of course, in over-romanticizing animal behavior, in crowding it with our own projections. But sometimes the raw power of what we observe refuses to stay in neat, objective boundaries. Watching one chimp carefully tend another’s wound is like being present at a quiet, wordless conversation about pain and responsibility.
For decades, researchers have cautiously explored the question of whether chimpanzees experience empathy—whether they truly recognize and respond to the emotional states of others. We’ve seen them comfort distressed group members, reconcile after conflict, and show concern when an infant is injured or separated. But here, in these insect-anointing moments, the picture sharpens even more.
When an uninjured chimp stops what they are doing, captures an insect, and deliberately treats another’s open wound, it suggests several mental steps:
They must notice the injury. They must recognize that it is a problem. They must connect the act of applying the insect to the idea of helping. And then they must choose to act.
None of this proves that chimpanzees sit around forming philosophical theories about well-being. Yet it does nudge us closer to acknowledging that their sense of each other’s suffering—and their desire to reduce it—runs deeper than we previously dared to fully admit.
How Often Does This Happen?
Over the span of the study, dozens of insect-application events were documented across multiple individuals and different social contexts. While not every chimp in the group was seen performing the behavior, it appeared sufficiently widespread that researchers suspect social learning is at play.
Young chimps watching adults may learn that “when someone is hurt, you do this.” The action itself can spread through generations like cultural knowledge—just as tool use, specific feeding techniques, or unique group calls vary from one chimpanzee community to another across Africa.
To put some of the behavioral observations into perspective, consider this simplified snapshot of the study’s recorded events:
| Observation Detail | Summary |
|---|---|
| Number of documented insect applications | Dozens of events observed over several years, indicating a repeatable pattern rather than a single incident. |
| Who performed the behavior | Multiple individuals of different ages and sexes; often adults, but occasionally juveniles as well. |
| Target of treatment | Both self-applied and applied to others, including offspring and unrelated group members. |
| Type of wound | Mostly superficial cuts and abrasions, visible on limbs, feet, or shoulders. |
| Behavioral context | Often during resting periods or after minor accidents or skirmishes; other chimps sometimes watching closely. |
Even this simple overview hints at something complex: a flexible behavior that seems to cross individual boundaries, a potential piece of medical culture taking shape in the forest shade.
Rethinking the Line Between Humans and Other Animals
Human history is filled with stories we tell ourselves about how different we are. We are the toolmakers, the doctors, the nurses, the pharmacists. We are the ones who diagnose, treat, and care with intention. But each time we look closely at other species, the edges of that story blur.
Chimpanzees already shattered old assumptions when they were first seen cracking nuts with stones, fishing for termites with sticks, or crafting spears to hunt small mammals. Then came evidence of regional “dialects,” group-specific traditions, and tight social bonds that included mourning the dead. The insect-on-wounds behavior is the newest, and perhaps one of the most intimate, additions to this evolving picture.
It’s one thing to manipulate a stone or a branch. It’s another to intervene in another creature’s pain with what appears to be deliberate, practiced care. That leaps beyond tool use into a kind of proto-medicine—and it pushes us to reconsider where, exactly, we draw the line between our own medical traditions and those of our closest living relatives.
A Window Into Shared Vulnerability
Watching chimpanzees tend their wounds reminds us that pain and injury have always been constant companions in the story of life. Long before hospitals, bandages, or antibiotics, bodies were being torn, cut, infected, and bruised. And long before humans arrived on the scene, living beings were experimenting—consciously or not—with whatever the environment offered for relief.
In this light, the behavior of Uganda’s chimpanzees is not just a curiosity; it is part of a much larger tapestry of adaptation and care. It suggests that the roots of medicine may run deeper than our species alone—that what we now call “healthcare” might actually be an ancient, shared impulse among social, intelligent animals who rely on one another to survive.
The forest becomes, in this sense, a living archive of experiments in healing. Every leaf chewed to calm a stomach parasite, every strip of bark used to scratch an unreachable itch, every insect broken open on an open wound—these are all small, silent notes in a grand, cross-species notebook of trial and error. We stumbled into this notebook late and gave it names, formulas, and labels. But the chimpanzees of Uganda remind us we were not the first to write in it.
Why This Discovery Matters for Conservation
Beyond the wonder and the scientific questions, this discovery forces a more urgent, practical reflection: What do we stand to lose if the forests that harbor such behaviors disappear?
Budongo and other African forests face the familiar, relentless pressures of logging, agriculture, and human encroachment. Chimpanzee populations are fragmented, their home ranges nibbled at by roads and farms. Every time a forest shrinks, it’s not just trees and birds and mammals being pushed to the margins. It’s cultures. It’s knowledge.
The practice of using insects on wounds might exist only in this particular community—or perhaps in a few others yet to be properly documented. If these chimps vanish, their traditions vanish with them. No one else will ever apply that specific insect to that specific kind of injury in quite the same way again. And that loss is immeasurable, not just in scientific terms, but in terms of what it means to share a planet with other beings who are, in their own quiet ways, thinking, learning, and taking care of each other.
To protect chimpanzees is to protect a parallel thread of intelligence running through the world—a thread that tells its own stories, invents its own remedies, and tends its own wounded. Each new discovery like this makes the case for conservation not only as an act of compassion but as a profound responsibility to the diversity of minds that evolved alongside ours.
The Questions Still Hanging in the Air
Even with the study published and debated, the forest still holds more questions than answers. Among them:
- Which insect species are used? Identifying them precisely is key to understanding any medicinal properties they may have.
- Do these insects contain known antibiotic or anti-inflammatory compounds? Laboratory tests might reveal biochemical secrets that could even inspire human medicine, as many natural substances have done.
- How is this behavior learned and transmitted? Do mothers consistently teach it to their offspring? Is it demonstrated more after certain kinds of injuries?
- Is this unique to one community? Or have we simply been too distracted, too unfamiliar, or not observant enough to notice it elsewhere?
On any given day in Budongo, while the forest hums and breathes, the answers to these questions hang somewhere between the branches, moving with the chimpanzees as they travel from feeding site to resting place. The researchers will keep following, recording, and quietly marveling. And the chimps, unaware of the headlines and arguments their actions have sparked, will keep tending to their own small but vital emergencies—one insect, one wound, one act of care at a time.
FAQs
Do the insects definitely have medicinal properties?
Scientists do not yet know for certain. The behavior strongly suggests that the insects may have beneficial effects—perhaps antibacterial or anti-inflammatory—but this must be confirmed through careful identification of the insect species and laboratory testing of their chemical compounds.
Have other animals been seen using medicine?
Yes. Many animals appear to self-medicate. Some primates swallow certain leaves to fight parasites, birds may use aromatic plants in their nests to repel insects, and elephants have been observed eating specific plants that may help induce labor. The chimpanzees’ use of insects on wounds, however, is one of the more striking examples of external “first aid.”
Is this behavior common in all chimpanzees?
So far, this specific insect-application behavior has been documented in a particular community of wild chimpanzees in Uganda. It is not yet clear how widespread it is in other populations. Chimpanzee communities often have their own distinct traditions and techniques, much like human cultures.
Could this help human medicine in the future?
Potentially, yes. If the insects used by chimpanzees contain previously unknown or underappreciated medicinal compounds, they might inspire new lines of research in human healthcare. Many modern medicines have roots in natural substances discovered through observing nature.
What does this tell us about chimpanzee intelligence?
This behavior suggests a sophisticated combination of problem-solving, social learning, and empathy. Chimpanzees not only appear to recognize injuries as conditions that can be treated, but they also sometimes treat others’ wounds, hinting at an understanding of other individuals’ needs and suffering.
How can people support chimpanzees and their habitats?
Protecting chimpanzees primarily means protecting their forests. Supporting reputable conservation organizations, advocating for the preservation of tropical forests, and being mindful of products linked to deforestation are all meaningful ways to help safeguard the environments where chimpanzee cultures—and their quietly remarkable medical practices—can continue to thrive.
