Colombia's last roaming tribe

A Colombian Nukak Maku Indian child rests in a refugee camp at Agua Bonita near San Jose del Guaviare of Guaviare province September 3, 2015. The Nukak first made contact with the outside world in 1988 - one of the last of Colombia's 102 tribes to do so. Disease has killed more than half of them since then, and they now number only about 500. REUTERS/John Vizcaino

Colombian Nukak Maku Indian people walk on a street in San Jose del Guaviare of Guaviare province September 4, 2015. They are just one of 34 indigenous groups at risk of extinction in Colombia, forced to flee their lands by warring factions in the country's 51-year conflict. REUTERS/John Vizcaino

A Colombian Nukak Maku Indian boy gestures in a refugee camp at Agua Bonita near San Jose del Guaviare of Guaviare province September 3, 2015. At Agua Bonita, an area of lush farmland set aside by the government for the 80 Nukak who live here, the collapse of the tribe's traditional way of life is palpable. REUTERS/John Vizcaino

Colombian Nukak Maku Indian people walk on a street in San Jose del Guaviare of Guaviare province September 4, 2015. Corrugated zinc has replaced palm-leaf roofs, the village is strewn with litter, music blaring from the radio has driven out Nukak songs, and fizzy drinks and government food aid have replaced the staple diet of forest berries and monkey meat. REUTERS/John Vizcaino

A Colombian Nukak Maku Indian woman counts money at a park in San Jose del Guaviare of Guaviare province September 4, 2015. Government medical missions to Nukak settlements to treat malnutrition and respiratory diseases are replacing traditional doctors. REUTERS/John Vizcaino

A Colombian Nukak Maku Indian boy is seen on the street in San Jose del Guaviare of Guaviare province, September 4, 2015. These days they are more likely to play football or loll in their hammocks, while older women and children walk barefoot to town to sell the bracelets and baskets they weave. REUTERS/John Vizcaino

A Colombian Nukak Maku Indian man weaves with his foot in a refugee camp at Agua Bonita near San Jose del Guaviare of Guaviare province September 3, 2015. Nukak men now face a two-week trek through rainforest to find monkeys, so they are hunting less. REUTERS/John Vizcaino

A Colombian Nukak Maku Indian boy rests in a hammock in a refugee camp at Agua Bonita near San Jose del Guaviare of Guaviare province, September 3, 2015. The move to settlements has forced the Nukak to grapple with once alien concepts like borders, private property and money. REUTERS/John Vizcaino

A Colombian Nukak Maku Indian boy is seen in a refugee camp at Agua Bonita near San Jose del Guaviare of Guaviare province September 3, 2015. Such rapid change has produced anxiety and stress, along with a deep sense of loss they find hard to handle. REUTERS/John Vizcaino

Colombian Nukak Maku Indian Joaquin Niijbe, 27, talks in a refugee camp at Agua Bonita near San Jose del Guaviare of Guaviare province September 4, 2015. Among the Nukak, teenagers who have never known or can no longer recall life as hunter-gatherer nomads, suffer acutely. REUTERS/John Vizcaino

Colombian Nukak Maku Indian woman and children walk barefoot on a street in San Jose del Guaviare of Guaviare province September 3, 2015. The Nukak are polygamous and once lived in small groups in the jungle. But now in the settlements they are clustered in large groups of up to 100, straining community and family ties. REUTERS/John Vizcaino

A Colombian Nukak Maku Indian woman holds her baby in a park in San Jose del Guaviare of Guaviare province, September 4, 2015. REUTERS/John Vizcaino

A Colombian Nukak Maku Indian girl cooks while her brother looks on from a hammock at a refugee camp near San Jose del Guaviare, May 12, 2005. REUTERS/Eliana Aponte

Colombian Nukak Maku Indian children and women are seen in a refugee camp at Agua Bonita in San Jose del Guaviare of Guaviare province September 3, 2015. REUTERS/John Vizcaino

A Colombian Indian Nukak Maku boy rests in a hammock on his tent near San Jose del Guaviare province southeast of Bogota on April 6, 2008. REUTERS/Jose Miguel Gomez

A Colombian Nukak Maku Indian sits with his children in a refugee camp near San Jose del Guaviare of Guaviare province southeast of Bogota, May 12, 2005. REUTERS/Eliana Aponte

Colombian Nukak Maku Indian boys look at a picture of a nomadic Indian in the jungle at a refugee camp near San Jose del Guaviare of Guaviare province southeast of Bogota May 12, 2005. REUTERS/Eliana Aponte

A Colombian Nukak Maku Indian woman eats at a refugee camp near San Jose del Guaviare of Guaviare province southeast of Bogota, May 12, 2005. REUTERS/Eliana Aponte