DIAMANTE, Peru

At times, their presence is revealed by little more than footprints along a remote riverbank. In other instances, after encroachments on their territory, reports of violence emerge from deep within the jungle. And occasionally, pixelated videos captured by villagers show tense encounters as dozens appear at the forest’s edge.

For Carlos Trigoso, however, the appearance of isolated Mashco Piro tribespeople near his Indigenous village of Diamante in Peru has become a seasonal pattern – one that is now anticipated each year.

“They come very close to our village. It’s a risk to our community. As agents, we patrol upriver in boats, and when we come in contact, we tell them not to come close to our community,” Trigoso, 66, told Anadolu.

Trigoso, a member of the Indigenous Yine tribe, shares ethnic and linguistic ties with the Mashco Piro. As a protection agent working for Peru’s Culture Ministry, his role is to monitor signs of their presence and intervene when they approach – often during the Amazon’s dry season, when isolated groups move toward larger riverbanks to gather turtle eggs, a key seasonal food source.

Protection agents operate from remote surveillance outposts in areas where isolated groups are frequently sighted. Patrolling rivers and forest corridors, they aim to protect nearby communities while also safeguarding the well-being of isolated tribes, preventing unwanted contact and territorial incursions.

“It’s dangerous work. We try to deescalate more than anything else. We converse with them. We let them know we belong to the same people. And they understand that,” said Trigoso. “But when there’s tension, it can be dangerous. They don’t have the same mentality as us. We warn them that they can’t kill our villagers.”

This fragile coexistence has become harder to maintain.

As loggers, miners and other actors – both legal and illegal – push deeper into the Amazon, and as climate change affects the availability of forest resources, some of the world’s last isolated tribes are being forced out of deeper isolation.

While the reasons behind increased contact remain unclear, experts say the trend is raising the risk of violent encounters.

In Diamante, repeated visits by the Mashco Piro over more than a decade have already led to tragedy. In 2011, Trigoso’s father-in-law was killed by a Mashco Piro arrow. Villagers believe a fragile relationship – built on the exchange of food and tools – broke down, though the exact motive remains unknown.

Who are the Mashco Piro?

After Brazil, Peru has the second-largest population of isolated Indigenous groups in the world. Government estimates suggest around 7,500 people across more than 25 ethnic groups live in isolation or have established sustained contact in recent decades.

At least 20 isolated tribes are believed to live in Peru, according to Survival International, an Indigenous rights group.

The Mashco Piro, who inhabit a vast territory along the Peru-Brazil border, are considered the largest known group of isolated tribespeople on Earth.

Yet despite their visibility in recent years, little is known about their lives, providing fertile ground for falsehoods and skewed narratives.

“The misconception is that these people are isolated hunter-gatherers who are still living (as though they were) in the Pleistocene; that they are people who have been uncontacted for thousands of years,” said Glenn Shepard, a medical anthropologist and ethnobotanist who has worked with Indigenous groups in Peru’s Amazon for more than three decades.

“The fact is that in all the cases that I’m aware of, these people have chosen isolation as a survival strategy fairly recently.”

Shepard explained that many groups withdrew into remote areas during the 19th and 20th century rubber boom, when widespread violence, enslavement and disease devastated Indigenous populations.

“Because of massacres and mistreatment, they chose to isolate themselves from outsiders. And they probably know more about us than we know about them, because their survival strategy depends on them knowing where we are and what we’re doing so they can stay away,” he said.

“The Mashco Piro were an extremely severe case because not only were they kicked off their lands, they lost agriculture and boats and fishing.”

Pressure from outside

The forces that drove these groups into isolation have not disappeared. Instead, they have intensified.

Oil exploration, logging, mining, drug trafficking and land-grabbing – combined with expanding road networks – are steadily shrinking the remote refuges these communities depend on.

Although Peru formally recognizes the territorial rights of isolated tribes, it still permits resource extraction in protected areas if deemed a “public necessity.”

In practice, that has created overlapping land use. Legal logging concessions often intersect with territories used by isolated groups, increasing the likelihood of encounters.

Violence has followed. In 2024, at least two loggers were killed by Mashco Piro arrows after entering their territory. Researchers say such incidents are reported more frequently than the killings of isolated people by outsiders, which often go undocumented.

FENAMAD, the regional Indigenous federation representing tribes in Peru’s Cusco and Madre de Dios regions, has taken legal action against the Peruvian government, arguing it has failed to adequately protect isolated communities.

Managing contact, for now

In response, authorities and Indigenous organizations have established a network of surveillance outposts across Madre de Dios and neighboring regions.

A key part of this approach involves leaving food – such as plantains, cassava and corn – at designated riverbank sites, where the Mashco Piro collect it before returning to the forest.

The practice has helped reduce tensions and avoid direct confrontation in recent years.

But it is not without controversy.

Some experts argue that providing food risks creating dependency and may gradually draw isolated groups into closer contact with outside society. For now, however, it remains one of the few tools available to manage a volatile situation.

Despite these efforts, the work of protection agents remains fraught with danger.

“(Protection agents) are the ones negotiating this delicate limbo state of isolated peoples.
You have to recognize that the people working in the field, in these organizations … are heroes,” said Shepard.

For Trigoso, who has spent a decade working along these remote riverbanks, the current balance feels increasingly fragile.

He believes that it is only a matter of time before the Mashco Piro, willingly or not, are drawn into the fold of national society.

“For now, we talk to them, we give them their food, and the situation is stable,” said Trigoso.