Air surveillance images showed the tribe in the Javari Valley close to the border with Peru, according to Fabricio Amorim of the National Indian Foundation (Funai).
The flights showed four large villages featuring huts and plantings of corn and bananas by the community, Funai said.
"The plantation, as well as the huts, are new, dated to a maximum of one year," said Mr Amorim.
"The state of the straw used in construction and the planting of corn indicate this. Besides corn, there was bananas and a vegetation in undergrowth that appeared to be peanuts, among other crops." The flyovers were carried out after small forest clearings were detected on satellite images, indicating the possibility of human settlements.
Brazilian authorities ban the general population from any contact with the isolated tribes due to concerns that they could easily become infected with diseases for which they carry no immunity.
The region is already threatened by illegal logging, fishing and gold mining operations and by drug traffickers operating in the area, according to Funai officials.
The newly discovered group probably belongs to the Pano linguistic community which lives in the area, Mr Amorim said.
Funai has not established contact with the group but said that the Javari Valley is regarded as having the "highest concentration of isolated groups in the Amazon and the world" and could be home to 2,000 indigenous people from at least 14 tribes.
Don't be fooled by Bernie Sanders - he's a diehard communist 2016-02-11 3:50 As polls tighten and self-described socialist Bernie Sanders looks more like a serious contender than a novelty candidate for president, the liberal media elite have suddenly stopped calling him socialist. He’s now cleaned up as a “progressive” or “pragmatist.”
But he’s not even a socialist. He’s a communist.
Mainstreaming Sanders requires whitewashing his radical pro-communist past. It won’t be easy to do.
Roosh Really is a Rape Advocate (& a Rapist, if He’s Telling the Truth) 2016-02-11 3:16 Ed comment: When we covered the press conference earlier this week. We wrote: There are many different levels of criticism that is thrown around - perhaps some more valid than others.Well, the below piece is just such valid criticism.
It's clear that the media made the right accusation, BUT over the wrong material. The most recent accusation was clearly based on ...
NY School Organizes ‘Hijab Day’ For Non-Muslim Students 2016-02-10 22:10
Officials at Rochester’s World School of Inquiry spent last week fielding dozens of calls from parents angry about a “World Hijab Day” event that encouraged girls to wear the Muslim religious head covering.
Sophomore Eman Muthana wears a hijab to school and wrote a letter to principal Sheela Webster asking if the school can put on its own World Hijab Day ...