A group of huts made of palm leaves are seen on the bank of a river in the jungle of Madre De Dios September 18, 2007. A little-known nomadic Indian tribe has been spotted by ecologists in Peru's Amazon rainforest, carrying arrows for bows and staying in huts made of palm leaves on a bank of the Las Piedras river. Ecologists photographed the indigenous group while flying over a nature reserve near Peru's border with Brazil to look for illegal loggers, who often encroach on lands tribes use for hunting and gathering. Picture taken September 18, 2007. Reuters Pictures 21 months ago

A group of huts made of palm leaves are seen on the bank of a river in the jungle of Madre De Dios September 18, 2007. A little-known nomadic Indian tribe has been spotted by ecologists in Peru's Amazon rainforest, carrying arrows for bows and staying in huts made of palm leaves on a bank of the Las Piedras river. Ecologists photographed the indigenous group while flying over a nature reserve near Peru's border with Brazil to look for illegal loggers, who often encroach on lands tribes use for hunting and gathering. Picture taken September 18, 2007.