The pictures show a group of loincloth-wearing adults and children, carrying bows and arrows and wooden spears, living in Brazil, near the Peruvian border. Some of the tribesmen are painted with red and black vegetable dye. They point curiously as an airplane flies overhead.
The photos were taken during a flyover of the area by Brazil's Indian Affairs Department, which allowed the tribal rights group Survival International to publish them. The images will be featured in an episode of BBC1's "Human Planet," airing Thursday in the United Kingdom.
The Indians look healthy and had baskets full of manioc and papaya fresh from their gardens, Survival International said, but the tribe is at serious risk as illegal loggers hack down trees on Peruvian side of the border.
"The illegal loggers will destroy this tribe. It's vital that the Peruvian government stop them before time runs out. The people in these photos are self-evidently healthy and thriving. What they need from us is their territory protected, so that they can make their own choices about their future," Survival director Stephen Corry said.
Peru's Amazon Indian organization, Aidesep, issued a statement calling for action against the loggers. "We are deeply troubled by the authorities' lack of action ... despite complaints from Peru and abroad against illegal logging, nothing has been done," it said.
"It is necessary to reaffirm that these peoples exist, so we support the use of images that prove these facts," said Marcos Apurina of COAIB. "These peoples have had their most fundamental rights, particularly their right to life, ignored. ... It is therefore crucial that we protect them."
In a statement released by Survival International, Brazilian Indian leader Davi Kopenawa Yanomami also stressed the need to publicize the existence of Amazon tribes.
"The place where the Indians live, fish, hunt and plant must be protected. That is why it is useful to show pictures of the uncontacted Indians, for the whole world to know that they are there in their forest and that the authorities must respect their right to live there," he said.