A disturbing new behaviour has been documented among young male white-faced capuchin monkeys: they have been carrying away infant howler monkeys from another species, often with fatal results. Researchers studying tool-using capuchins on Jicarón Island, off Panama’s Pacific coast, recorded five young male capuchins carrying at least eleven baby howler monkeys over 15 months, a behaviour scientists say had not previously been recorded in wild primates.

What exactly are the capuchins doing?

White-faced capuchins have been seen abducting infant howler monkeys and carrying them around for days. The babies were not being eaten, groomed like family members, or properly cared for. Instead, they clung to the capuchins’ backs or bellies while the capuchins continued normal activities, including travelling and using stone tools.

The first known case involved a young male capuchin nicknamed Joker. After Joker began carrying a baby howler, other young males appeared to copy the behaviour. That copying is what makes the case so fascinating — and unsettling — because it suggests the behaviour spread socially, almost like a strange animal fad.

Where did this happen?

This behaviour was recorded on Jicarón Island in Panama’s Coiba National Park. The island is already famous among primatologists because its white-faced capuchins use stones as tools to crack open food sources, a rare and complex behaviour among wild monkeys.

The sightings came from more than 80 motion-activated camera traps originally placed to study capuchin tool use. Instead of only capturing stone-cracking behaviour, the cameras revealed young capuchins carrying tiny howler monkeys through the forest.

For readers in Costa Rica, the story feels close to home because both white-faced capuchins and howler monkeys are familiar figures in Central American forests. The exact documented behaviour, however, comes from Panama, not Costa Rica.

Why are scientists calling it kidnapping?

Scientists use the word “abduction” because the howler infants were dependent babies from another species and were removed from their mothers. The capuchins were not adopting them in any meaningful way, because the babies were too young to survive without milk, warmth, and species-specific care.

The key signs include:

• The howler infants were very young, in some cases only a few days old.
• The capuchins carrying them were all young males.
• The capuchins did not feed or nurse the babies.
• The babies weakened over time.
• At least four deaths were confirmed, and researchers believe most or all of the abducted infants likely died.

Are the capuchins killing the babies on purpose?

There is no clear evidence that the capuchins are deliberately killing the baby howlers. Researchers found no signs that the capuchins were hunting the infants for food or using them in aggressive attacks. The deaths appear to result mainly from starvation, dehydration, and the loss of maternal care.

That makes the behaviour even stranger. In nature, harsh behaviour usually has a clear survival logic: food, mating, territory, status, or protection. This behaviour does not neatly fit any of those categories.

Why would a capuchin kidnap a baby howler monkey?

The honest answer is that scientists do not yet know. Current explanations include boredom, social copying, misplaced curiosity, misdirected caregiving, or status experimentation among young males.

Possible theories include:

• Social fad: One capuchin starts the behaviour and others copy it.
• Boredom: Intelligent animals in unusual environments may invent behaviours.
• Curiosity: Capuchins are famously clever, hands-on problem solvers.
• Misplaced care: A young male may respond to a baby animal without understanding its needs.
• Social display: Carrying an infant may attract attention from other capuchins, though this has not been proven.

What makes the case remarkable is that the behaviour appears to bring no obvious benefit to the capuchins. Current Biology described it as a novel, apparently fitness-neutral behaviour, meaning it does not clearly improve survival or reproduction.

Why is this important for animal behaviour science?

This case matters because it shows that animals can develop new social traditions that are not always useful, beautiful, or beneficial. Many people think of animal culture as charming: birds learning songs, whales sharing feeding techniques, or monkeys washing food. This story is darker.

It suggests that culture in animals, especially intelligent social animals, can include behaviour that is:

• copied by peers,
• unnecessary for survival,
• harmful to other species,
• difficult to explain,
• emotionally uncomfortable for humans to watch.

The capuchins of Jicarón Island are already known for their intelligence and tool use. Now they are forcing scientists to consider a more complicated question: can smart animals create harmful trends simply because they are socially contagious?

What does this mean for howler monkeys?

For the howler monkeys, the behaviour is alarming. Infant survival is already one of the most fragile stages in a primate’s life. If young howlers are taken from their mothers, they have very little chance of survival.

This is especially concerning because the howlers on Jicarón Island belong to an endangered population. Even a small number of infant deaths can matter when a population is limited, isolated, or already under pressure.

Howler monkeys are slow, leaf-eating forest voices — the deep morning roar of the canopy. Capuchins are quick, bright-eyed opportunists with busy hands and flexible minds. When those two worlds collide in this way, the result is not a Disney forest scene. It is a reminder that nature can be clever, cruel, confusing, and completely unsentimental.

Could this happen in Costa Rica?

Strange interspecies interactions can occur anywhere capuchins and howlers overlap, but this particular kidnapping trend has been documented on Jicarón Island in Panama. There is no strong evidence that the same behaviour is currently happening among Costa Rica’s capuchins.

Costa Rica is home to both white-faced capuchins and mantled howler monkeys, so the species do share landscapes. Still, scientists should be careful before assuming this behaviour is widespread. At the moment, it appears to be a localised social behaviour among a specific group of young male capuchins.

What can travellers and wildlife lovers learn from this?

The main lesson is that wildlife is not entertainment; it is a living system full of intelligence, tension, and consequences. Monkeys are not forest mascots. They are complex primates with social politics, instincts, experiments, mistakes, and sometimes shocking behaviours.

For visitors in Costa Rica and Central America:

• Never feed monkeys.
• Do not encourage close contact.
• Keep food sealed and secure.
• Observe from a respectful distance.
• Support ethical wildlife research and conservation.
• Avoid turning wild animals into props for photos.

The capuchin kidnapping story is strange enough to grab headlines, but its deeper value is more serious. It reminds us that every forest has stories we have not yet understood.

FAQ

Are white-faced capuchins really kidnapping baby howler monkeys?

Yes, researchers recorded young male white-faced capuchins carrying away infant howler monkeys on Jicarón Island in Panama. At least eleven infant howlers were involved over 15 months.

Do capuchins eat baby howler monkeys?

No evidence shows that the capuchins were eating the baby howlers. The infants seem to have died mainly because they were separated from their mothers and could not survive without proper care.

Why did the behaviour spread?

The behaviour may have spread through social learning. After one young male, Joker, began carrying baby howlers, other young males appeared to copy him.

Is this happening in Costa Rica?

This specific behaviour has been documented in Panama, not Costa Rica. However, Costa Rica has both white-faced capuchins and howler monkeys, so researchers and naturalists may watch for similar interactions.

Are capuchin monkeys dangerous?

Capuchins are intelligent wild animals and should be respected, not touched or fed. They are not usually dangerous from a distance, but human feeding can make them bold, aggressive, and unhealthy.

What makes this discovery so unusual?

It is unusual because the behaviour has no obvious benefit. The capuchins were not hunting, adopting, feeding, or protecting the infants. Scientists see it as a rare example of a harmful social trend in wild primates.

John Quam, Editor-in-Chief, Howler Real Escapes Costa Rica: Web Article

You usually hear them before you see them. A rustle high in the canopy, a sudden shower of leaves, then a pale face peering down with an expression that seems almost too knowing. White-faced capuchin monkeys are one of Costa Rica’s great wildlife encounters, not just because they are photogenic, but because they feel startlingly present. They watch back.

For travelers, newcomers, and anyone building a life around Costa Rica’s natural richness, capuchins often become a favorite memory fast. They are clever, social, noisy when they want to be, and deeply woven into the experience of the country’s forests, beaches, and protected areas. But they are also a species that reminds us of a larger truth about Costa Rica. Wild beauty stays wild only when people give it room.

Why white-faced capuchin monkeys stand out

Among Costa Rica’s four monkey species, white-faced capuchin monkeys tend to steal the scene. Mantled howlers have the voice, squirrel monkeys have the speed, and spider monkeys seem built from pure motion. Capuchins bring personality.

They move through the trees in tightly connected groups, often with an alert, purposeful energy that makes the forest feel animated. Their creamy white faces and dark bodies are easy to recognize, and their behavior is even easier to remember. They inspect branches, search for insects and fruit, test objects with their hands, and seem constantly engaged with one another and their surroundings.

That intelligence is not your imagination. Capuchins are considered among the most cognitively advanced New World monkeys. They solve problems, learn socially, and adapt well to changing environments. In the wild, that can mean everything from using a technique to pry food from hard surfaces to navigating territories that overlap with roads, lodges, farms, and beach towns.

For visitors, this can create the illusion that they are friendly or tame. They are neither. They are wild animals that have become highly skilled at reading human habits.

Where you might see white-faced capuchin monkeys in Costa Rica

White-faced capuchin monkeys are found throughout Costa Rica, especially in lowland and dry forest regions along the Pacific coast, as well as in some transitional forest areas. If you spend time in places like Manuel Antonio, Santa Rosa, parts of the Nicoya Peninsula, or forested coastal zones in Guanacaste and the Central Pacific, your odds are good.

That said, wildlife does not work on a schedule. One morning, you may spot a whole troop moving like acrobats above a trail. The next day, in the same place, there may be nothing but iguanas and birdsong. Season, weather, fruit availability, and daily movement patterns all shape what you see.

The best sightings often happen when people slow down. Sit quietly near the forest edge at first light. Pause on a trail instead of marching through it. Look up when you hear branches shake in quick succession. In many parts of Costa Rica, capuchins announce themselves through motion more than sound.

What they eat and how they live

Capuchins are omnivores, and that flexible diet helps explain their success. They eat fruit, seeds, flowers, insects, eggs, and small animals when the opportunity is there. They are curious foragers, using their hands with remarkable precision, turning over bark, probing crevices, and investigating almost anything that might hold a meal.

Their social lives are just as dynamic. Troops can include multiple adults and juveniles, and life inside the group involves cooperation, competition, grooming, play, and constant awareness. Young capuchins learn by watching older members, which is one reason human-fed groups can develop problematic behavior quickly. Once one monkey figures out that a backpack might contain chips or fruit, others learn fast.

This matters more than many visitors realize. Feeding monkeys changes their movement patterns, increases aggression, and can pull them away from natural foods. It also puts them at risk near roads, parking lots, and buildings. What seems like a funny vacation moment can ripple through a troop for years.

The capuchin problem humans create

There is a reason park staff, guides, and longtime residents repeat the same advice. Do not feed the monkeys. Not once. Not for a photo. Not to get them closer.

White-faced capuchin monkeys are bold enough without encouragement. In heavily visited areas, they may snatch food, unzip bags, raid open vehicles, or leap onto outdoor tables. People often describe this as mischievous, and sure, it can look comical from a distance. But the backstory is usually human behavior.

When wildlife becomes habituated to snacks, everyone loses. Monkeys can become dependent, nutritionally stressed, and more likely to interact aggressively with people. Visitors get bitten or scratched. Property owners end up dealing with damaged roofs, torn screens, and frequent raids. Park rangers must manage an issue that should never have started.

Costa Rica’s success as a nature destination comes with this tension. The more people who come to admire wildlife, the more discipline is required to protect it. Admiration without boundaries becomes pressure.

Watching white-faced capuchin monkeys the right way

The best wildlife encounters are often the least intrusive. If you see white-faced capuchin monkeys, keep your food packed away, give them space, and resist the urge to call, whistle, or toss something for attention. A monkey that continues its natural behavior in your presence is a far better sighting than one that approaches because it expects a handout.

A local guide can make a huge difference. Not because capuchins are impossible to find, but because an experienced guide reads the forest in layers. They notice fresh movement in the canopy, distinguish monkey activity from coatis or squirrels, and explain social behaviors you would otherwise miss. Suddenly, a quick sighting turns into a story about territory, parenting, feeding, and adaptation.

Timing also helps. Early morning and late afternoon are often productive, especially in warmer coastal areas where midday heat can slow animal activity. Still, there are no guarantees. That unpredictability is part of the charm.

Why conservation still matters, even for a smart survivor

Capuchins are adaptable, but adaptable does not mean invulnerable. Habitat fragmentation remains a serious issue in many parts of Costa Rica. Roads cut through forest corridors. Power lines create dangerous crossings. Development can isolate troops in patches of habitat that look green on a map but function like islands on the ground.

One of Costa Rica’s ongoing conservation challenges is making sure wildlife can move safely between those patches. For monkeys, that may mean preserving canopy connections, installing wildlife bridges, and planning development with actual ecological continuity in mind instead of decorative landscaping.

This is where Costa Rica’s environmental reputation deserves both praise and realism. The country has done extraordinary work in reforestation, national parks, and biodiversity protection. At the same time, local communities, conservationists, and policymakers still face real pressure from growth, tourism demand, and infrastructure needs. White-faced capuchin monkeys thrive best where the forest is not just protected on paper, but connected in practice.

A more memorable sighting

There is a particular kind of morning in Costa Rica when the light comes in low and gold, the air still holds a little coolness, and the forest seems to wake up in sections. Birds first. Then insects. Then the movement overhead. A capuchin pauses on a branch, tail balanced, scanning below with absolute confidence. Another follows, carrying a youngster close behind. The troop passes through and the trees settle again.

That moment lands because it feels earned. Not staged, not fed, not interrupted. Just a glimpse into a living system that still works.

For readers who come to Costa Rica looking for beauty, white-faced capuchin monkeys offer something better than a postcard scene. They offer a relationship between forest and coastline, tourism and responsibility, curiosity and restraint. They are entertaining, yes, but they also represent the kind of country Costa Rica has fought to remain: biologically rich, visibly alive, and worth treating with care.

If you are lucky enough to meet their gaze from below, let that be enough. Pack up your snacks, keep your distance, and leave the canopy to its rightful residents. The best travel memories are not the ones you control. They are the ones you are invited to witness.

FAQ

Are white-faced capuchin monkeys dangerous?

White-faced capuchin monkeys are not naturally looking for trouble, but they can bite or scratch if people get too close or offer food. Respect their space and keep your belongings secure.

Can I feed capuchin monkeys fruit?

No, you should not feed capuchin monkeys fruit or any other food. Even natural-looking food can change their behaviour and encourage dangerous interactions with people.

What is the best time of day to see capuchins?

Early morning and late afternoon are often the best times to see capuchins, especially in warmer coastal areas. Midday heat can make animals less active.

Are capuchins found near beaches in Costa Rica?

Yes, capuchins are often seen near forested beach areas, especially where coastal habitats connect with protected forests. Manuel Antonio is one of the best-known examples.

Why do capuchins steal food?

Capuchins steal food because they are intelligent, opportunistic, and quick learners. In tourist areas, repeated human feeding teaches them that bags, tables, and vehicles may contain easy snacks.

Do capuchins live in groups?

Yes, capuchins live in social troops with adults, juveniles, and young monkeys. Their group life includes grooming, play, competition, learning, and cooperation.

What should I do if a capuchin comes close?

Stay calm, secure your food, avoid eye contact that feels confrontational, and do not reach out. Give the monkey room to move away.