Chimpanzees point researchers to a non-native bioactive plant

A new Animals study suggests wild chimpanzees may have led scientists to a biologically active plant that had gone unrecognized in Africa. Researchers monitoring chimpanzees in Sebitoli, in Uganda’s Kibale National Park, reported that the apes repeatedly and selectively ate small amounts of pith from a plant known locally as “Angel’s trumpet.” After botanical identification, the plant turned out to be Acnistus arborescens, a species native to Central and South America and, according to the paper, not previously reported in Africa. (citedrive.com)

The work builds on a longer line of primate self-medication research, including earlier studies from Kibale that have examined how chimpanzees use plants and even soil in ways that may affect parasite burden or bioactivity. In this case, the authors argue that several classic clues of self-medicative behavior were present: low-frequency consumption, small ingested quantities, food processing for little nutritional reward, and alignment with local ecological knowledge about plant effects. Sebitoli itself has been the site of long-term chimpanzee monitoring since 2008, giving the team a substantial behavioral baseline. (citedrive.com)

The paper’s key observations are specific. Across 890 observation days, researchers recorded 25 consumption events involving 18 chimpanzees, each consuming roughly 10 grams of pith. Chemical analysis of the plant’s leaves and pith found multiple withanolides and cinnamides, with some compounds detected only in the pith, the portion the chimpanzees selected. The authors note that withanolides from this plant have already been studied in mice and humans for anxiolytic effects, which strengthens the case that the animals may be targeting biological activity rather than calories. (citedrive.com)

There’s also an ecological twist. Because Acnistus arborescens is not native to Africa, the finding isn’t just about animal behavior or natural-product discovery. It also raises questions about plant introduction pathways, establishment in protected landscapes, and whether wildlife can incorporate novel species into their behavioral repertoires. The authors explicitly say the finding opens new questions about the plant’s distribution, potential invasiveness, and possible biological uses for humans and wildlife in Africa. (citedrive.com)

Outside commentary on this exact paper appears limited so far, but the broader toxicology literature underscores why caution matters when plants are discussed under shared common names. Reviews of Brugmansia, another plant commonly called angel’s trumpet, describe a very different chemistry profile, with tropane alkaloids such as scopolamine, hyoscyamine, and atropine, alongside well-documented poisoning risk. Veterinary toxicology references likewise warn that angel’s trumpet exposures can be dangerous in pets, reinforcing that common names can obscure clinically important differences. (link.springer.com)

Why it matters: For veterinary professionals, this is a reminder that animal behavior can be a useful signal in drug discovery and comparative medicine, but it’s only a starting point. Wildlife observations can help surface candidate plants and compounds, yet translation into veterinary relevance requires rigorous species identification, toxicology, pharmacology, dose characterization, and formulation work. The study may be most useful as a model for bioprospecting informed by animal behavior, especially as interest grows in plant-derived therapeutics, nutraceuticals, and ethnoveterinary leads. At the same time, it highlights a more immediate One Health issue: non-native plants with bioactive chemistry can create both research opportunities and toxicologic risks for wildlife, livestock, and companion animals. (citedrive.com)

For clinicians, the practical takeaway is restraint. The paper does not establish efficacy, safety, or a veterinary indication for Acnistus arborescens. It documents selective consumption and identifies bioactive compounds, but it doesn’t show that the plant improves health outcomes in chimpanzees, much less in dogs, cats, horses, or food animals. That distinction matters, especially because pet parents may hear “bioactive” or “medicinal” and assume a plant is safe. In toxicology and clinical practice, those are very different questions. (citedrive.com)

What to watch: The next steps will likely be botanical surveys to confirm how widespread Acnistus arborescens is in Uganda or elsewhere in Africa, controlled work to define which compounds are driving the observed interest, and follow-up behavioral or health studies to test whether the chimpanzees’ use is truly self-medicative rather than incidental. If that evidence accumulates, veterinary researchers may eventually see this kind of wildlife-guided screening feed into broader natural-product pipelines. (citedrive.com)