Cozumel, Mexico, is known for reefs and cruise ships, not exactly a hotspot for breakthrough animal behavior research. That changed thanks to two young pygmy raccoon sisters who turned soggy paper trash into a new kind of toy, and a few patient scientists who were watching. A new study describes how the siblings dunked napkins and receipts in a water bowl, rolled them in the sand, and played with the resulting balls. It is the first documented hint that this critically endangered species may pick up object skills by watching each other.
- Two juvenile female pygmy raccoons, described as sisters, were observed on Cozumel Island off the Yucatán Peninsula.
- They repeatedly dipped paper waste into a stainless-steel water bowl and rolled it on the sand into ball shapes.
- Researchers logged 14 ball-making attempts and 8 successful balls during 64 hours of watching, a 57.1% success rate.
- A presumed mother raccoon also tried, but fumbled after swiping a sip of a margarita from an unattended drink.
- The study, by researchers at Miami University in Ohio and a Cozumel municipal ecologist, is published on mdpi.com.
How we got here: a barely-studied island raccoon
The pygmy raccoon is a small, critically endangered cousin of the mainland raccoon, recognisable by a broad black band across the throat and a golden-yellow tail. It lives almost entirely on Cozumel, which has kept it geographically isolated and very poorly studied. Most of what we know about raccoon intelligence comes from their mainland relatives. The Cozumel population has had far less scientific attention, partly because the island is small and partly because the animals are rare.
This study was built around a different question, not raccoon cleverness for its own sake, but how tourism shapes animal behavior on a busy island. A team that included Nessie O'Neil and Michelle Szydlowski of Miami University in Ohio, plus Cozumel municipal ecologist Noel Anselmo Rivas-Camo, set out to watch how raccoons around beach clubs handle human trash. The paper-ball discovery came as a side effect of those long, patient hours.
What changed now: a sister act caught on camera
The headline moment came at one beach club, where a stainless-steel water bowl had been set out for animals. Two juvenile sisters started grabbing paper waste, including napkins and receipts, from a nearby bin. They dipped the paper in the bowl, then used their small forepaws to roll the wet pieces across the sand until they held a ball shape. Once the ball was ready, they played with it.
The sequence was not random. One sister performed the full routine first. The other watched closely, then tried to copy it, fetching paper from the same bin. Mid-copy, the first sister snatched the paper back and finished the ball herself. A few days after the older sibling was removed from the site, the second raccoon completed the whole sequence solo. That order, watch, fail, then succeed on her own, is exactly the pattern researchers look for when weighing social learning.
A presumed mother raccoon also took a turn. She placed paper in the water bowl but struggled to retrieve it, then wandered off. The team flagged a likely reason: she had earlier snagged a sip of a margarita from an unattended drink, which they suggest may have dulled her dexterity.
Our analysis: why this matters, and what it does not yet prove
The honest read on this study is that it is exciting but tiny in sample size. Two sisters, one beach club, one bowl, and a handful of ball-making sessions. Raccoons at a similar beach site with the same access to water and paper did not show the behavior, which is suggestive, but it is one comparison, not a controlled experiment. So the big claim, that pygmy raccoons can learn object use from one another, sits in the "plausible and worth chasing" zone, not the "settled science" zone.
Still, the direction is interesting. Most documented tool and object use in mammals comes from a few well-studied species. A small island carnivore quietly inventing a toy out of trash would expand that list in a charming way. It also hints at something researchers already suspected: isolation on Cozumel may have given this population its own behavioral quirks, separate from mainland raccoons.
What is still unknown: whether other Cozumel raccoons do this when nobody is watching, whether the skill sticks across generations, and whether the margarita detail is a funny footnote or a real behavioral disruptor. If the behavior proves stable and transmissible, it would mark a cultural tradition in an endangered carnivore—rare and significant. If it fizzles, it remains a delightful anecdote about two clever sisters on a Mexican beach.
Who should care
| Stakeholder | Why it matters |
|---|---|
| Conservation researchers | Behavioral flexibility is a survival asset. Evidence of social learning suggests these raccoons can adapt to human-dominated landscapes—a hopeful sign for a species with very few individuals left. |
| Cozumel tourism operators | Your beach club setup matters. Water bowls and accessible trash create unintended experimental conditions. What raccoons learn at your property may spread—or fail to spread—across the island. |
| Wildlife managers | Isolated island species often lack behavioral diversity. Documenting traditions, even small ones, adds to the picture of what the population needs to survive long-term. |
| Curious readers | This is a rare, accessible window into how animals acquire new skills. The margarita subplot does not hurt. |
Bottom line
Two raccoon sisters probably taught themselves a new game using beach trash, and one mom got slightly tipsy trying to join in. Watch for follow-up studies with bigger groups and other sites, and for any sign this ball trick shows up in raccoons that have never seen a beach club.
Key takeaways
- Pygmy raccoon sisters on Cozumel were filmed turning wet paper into play balls, a behavior never before recorded in this species.
- One sister watched and later replicated the routine solo, a pattern researchers associate with social learning.
- A presumed mother failed after apparently sipping a stolen margarita, a small but memorable detail in the study.
- Results come from two individuals at one beach, so claims about cultural learning remain preliminary, not proven.
Frequently asked questions
What exactly did the pygmy raccoon sisters do?
They grabbed paper from a trash bin, dipped it in a water bowl, rolled it on sand into a ball, and played with the result. Researchers logged 14 attempts and 8 successful balls.
Where did this happen?
At a beach club on Cozumel, a Mexican island off the Yucatán Peninsula that is the main home of the critically endangered pygmy raccoon.
Did the mother raccoon succeed?
No. She tried to soak paper in the water bowl but gave up, and the study suggests a stolen sip of margarita may have hurt her dexterity.
Does this prove raccoons can learn from each other?
Not yet. The authors call it evidence consistent with social learning. More observation at more sites is needed before it counts as proof of a cultural tradition.
Why is this discovery significant for the species?
Pygmy raccoons are critically endangered and poorly studied, so any sign of behavioral flexibility and social learning helps researchers understand how they might adapt to a heavily touristed island.