Peruvian authorities are struggling to keep outsiders away from a clan of previously isolated Amazon Indians who began appearing on the banks of a jungle river popular with environmental tourists last year.
The clan that showed up at the river is believed to number about 60, including some 25 adults
The behaviour of the small group of Mashco-Piro Indians has puzzled scientists, who say it may be related to the encroachment of loggers and by low-flying aircraft from nearby natural gas and oil exploration in the south-eastern region of the country.
Clan members have been blamed for two bow-and-arrow attacks on people near the riverbank in Madre de Dios state where officials say the Indians were first seen last May.
One badly wounded a forest ranger in October. The following month, another fatally pierced the heart of a local Matsiguenka Indian, Nicolas “Shaco” Flores, who had long maintained a relationship with the Mashco-Piro.
The advocacy group Survival International released photos showing clan members on the riverbank, describing the pictures as the “most detailed sightings of uncontacted Indians ever recorded on camera”.
The British-based group provided the photos exactly a year after releasing aerial photos from Brazil of another tribe classified as uncontacted, one of about 100 such groups it says exist around the world.
One of the Mashco-Piro photos was taken by a bird watcher in August, Survival International said. The other two were shot by Spanish archaeologist Diego Cortijo on November 16, six days before Mr Flores was killed.
Mr Cortijo, a member of the Spanish Geographical Society, was visiting Mr Flores while on an expedition in search of petroglyphs and said clan members appeared across the river from Mr Flores’ house, calling for him by name.
Mr Flores could communicate withthe Mashco-Piro because he spoke two related dialects, said Mr Cortijo, who added that Mr Flores had previously provided clan members with machetes and cooking pots.
The Mashco-Piro tribe is believed to number in the hundreds and lives in the Manu National Park that borders Diamante, a community of more than 200 people where Mr Flores lived.
Although it’s not known what provoked the Mashco-Piro clan to leave the relative safety of their tribe’s jungle home, Beatriz Huerta, an anthropologist who works with Peru’s Inedpa agency for indigenous affairs, speculated their habitat is becoming increasingly less isolated.
The upper Madre de Dios region where the tribe lives has been affected by logging, she said. “They are removing wood very close”.
Meanwhile, Ms Huerta said, naturalists in the area and Manu National Park officials told her during a recent visit that a rise in air traffic related to natural gas and oil exploration in the region is adversely affecting native hunting grounds, forcing increasing migration by nomadic tribes.
The clan that showed up at the river is believed to number about 60, including some 25 adults, said Carlos Soria, a professor at Lima’s Catholic University who ran Peru’s park protection agency last year.
“It seemed like they wanted to draw a bit of attention, which is a bit strange because I know that on other occasions they had attacked people,” Mr Cortijo said by phone from Spain. “It seemed they didn’t want us to go near them, but I also know that the only thing that they wanted was machetes and cooking pots.”
Mr Cortijo said the group lingered by the river a few minutes, apparently to see if a boat would pass by so they could ask for some tools, something authorities say they had done in the past.
“The place where they are seen is one of heavy transit of river cargo and tourist passage, and so the potential for more violent encounters remains high,” Prof. Soria said.
That is compounded by culture clash. The Mashco-Piro live by their own social code, which Prof. Soria said includes the practice of kidnapping other tribes’ women and children. He said the Mashco-Piro are one of about 15 “uncontacted” tribes in Peru that together are estimated to number between 12,000 and 15,000 people living in jungles east of the Andes.