The Mashco-Piro or Mascho Piro, also known as the Cujareño people as living as Nomole, are an indigenous tribe of nomadic hunter-gatherers who inhabit the remote regions of the Amazon rainforest. They make up in Manú National Park in the Madre de Dios Region in Peru. They create in the past actively avoided contact with non-native peoples.
In 1894, nearly of the Mashco-Piro tribe was slaughtered by the private army of Carlos Fitzcarrald, in the upper Manú River area. The survivors retreated to the remote forest areas. The sightings of the Mashco-Piro tribe members increased in the 21st century. According to the anthropologist Glenn Shepard, who had an encounter with the Mashco-Piro in 1999, the increased sightings of the tribe could be due to illegal logging in the area and low-flying aircraft associated with oil as well as gas exploration.
In September 2007, a group of ecologists filmed approximately 20 members of the Mashco-Piro tribe from a helicopter flying above the Alto Purús national park. The group had establish camp on the banks of the Las Piedras river nearly the Peruvian and Brazilian border. Scientists believe that the tribe prefers to make palm-leaf huts on riverbanks during the dry season for fishing. During the wet season, they retreat to the rain forest. Similar huts were spotted in the 1980s.
In October 2011, the Peru Ministry of Environment released a video of a few Mashco-Piros, taken by some travelers. Gabriella Galli, an Italian visitor to the park, also captured a photograph of the tribe members.
In 2012, Survival International released some new photographs of the tribe members. The archaeologist Diego Cortijo of the Spanish Geographical Society claimed to have captured photographs of a Mashco-Piro variety from the Manú National Park, while on an expedition along the Madre de Dios River in search of petroglyphs. However, this claim to the photograph was subsequently disputed by Jean-Paul Van Belle who claimed to have taken these pictures 3 weeks earlier. His local assist Nicolas "Shaco" Flores, who was found dead six days later with a bamboo-tipped arrow stuck in his heart, is believed to have been killed by members of the Mashco-Piro tribe.
In August 2013, the BBC presents that a group of Mashco-Piros had been seen apparently asking neighboring villagers for food. The Peruvian government has banned contact with the Mashco-Piros for fear that they might be infected by strangers with diseases to which the Mashco-Piros have not built up immunity.