Brazilian natives parade during the opening ceremony of the International Games of Indigenous Peoples, in Cuiaba, state of Mato Grosso, on November 9, 2013. 48 Brazilian ethnic groups and indigenous representatives from 16 countries are taking part in the event which runs until November 16. (Photo by Christophe Simon/AFP Photo)

Brazilian indigenous participate in opening ceremony of XII Brazilian Indigenous Games in Cuiaba, Brazil, 09 November 2013. 1500 indigenous from 48 Brazilian ethnic groups will compete in ten traditional disciplines. (Photo by Fernando Bizerra Jr./EPA)

A Brazilian indigenous runs with the torch during opening ceremony of XII Brazilian Indigenous Games in Cuiaba, Brazil, 09 November 2013. (Photo by Fernando Bizerra Jr./EPA)

Members of Brazilian indigenous ethnic group Krao carry a tree trunk ahead of a relay race. The trunk serves as the baton. (Photo by Paulo Whitaker/Reuters)

Participants in the XII Indigenous People Games practice for a demonstration after the opening ceremony in Cuiaba, Matto Grosso state, Brazil, on November 9, 2013. 1500 natives from 49 Brazilian ethnic groups and from another 17 countries are gathering in Cuiaba until November 16 to compete in some 30 athletic disciplines, many of them their own. (Photo by Christophe Simon/AFP Photo)

Brazilian indigenous women from the Kraho ethnic group take part in the “Corrida de Tora” (race with a trunk), during the first day of the International Games of Indigenous Peoples, in Cuiaba, state of Mato Grosso, on November 10, 2013. (Photo by Christophe Simon/AFP Photo)

Members of Brazilian indigenous group Kuikuro dance during the XII Games of the Indigenous People in Cuiaba November 10, 2013. (Photo by Paulo Whitaker/Reuters)

Members of indigenous group Paresi dance during the XII Games of the Indigenous People in Cuiaba November 10, 2013. (Photo by Paulo Whitaker/Reuters)

Indigenous people prepare to compete in the bow-and-arrow competition at the XII Games of the Indigenous People in Cuiaba November 10, 2013. 48 Brazilian Indigenous tribes will present their cultural rituals and compete in traditional sports such as archery, running with logs and canoeing during the XII Games of Indigenous People which will run until November 16. (Photo by Paulo Whitaker/Reuters)

Members of indigenous group Paresi take photographs during the XII Games of the Indigenous People in Cuiaba November 10, 2013. (Photo by Paulo Whitaker/Reuters)

A member of indigenous group Pares dives to head the ball during an exhibition game of soccer where only heads are used to play the game, during the XII Games of the Indigenous People in Cuiaba November 10, 2013. (Photo by Paulo Whitaker/Reuters)

A member of indigenous group Kuikuro aims his arrow during the bow-and-arrow competition at the XII Games of the Indigenous People in Cuiaba November 10, 2013. (Photo by Paulo Whitaker/Reuters)

Indigenous people compete in the bow-and-arrow competition at the XII Games of the Indigenous People in Cuiaba November 10, 2013. (Photo by Paulo Whitaker/Reuters)

Brazilian natives of the Pareci tribe play head football with a hand-made ball for a demonstration, during the first day of the International Games of Indigenous Peoples, in Cuiaba, state of Mato Grosso, on November 10, 2013. (Photo by Christophe Simon/AFP Photo)

Members of indigenous group Mati practise blowing spears during the XII Games of the Indigenous People in Cuiaba November 10, 2013. (Photo by Paulo Whitaker/Reuters)

Brazilian natives of the Matis tribe take part in a blowpipe event, during the first day of the International Games of Indigenous Peoples, in Cuiaba, state of Mato Grosso, on November 10, 2013. (Photo by Christophe Simon/AFP Photo)

Brazilian natives of the Enawene Nawe ethnic group play a head football game during the first day of the International Games of Indigenous Peoples, in Cuiaba, state of Mato Grosso, on November 10, 2013. (Photo by Christophe Simon/AFP Photo)

A Brazilian indigenous man participates in the Jawary, a traditional indigenous competition, during the XII Brazilian Indigenous Games in Cuiaba, Brazil, 10 November 2013. (Photo by Fernando Bizerra Jr./EPA)

A Brazilian indigenous man participates in a bow and arch competition during the XII Brazilian Indigenous Games in Cuiaba, Brazil, 10 November 2013. 1,600 indigenous from 48 Brazilian ethnic groups will compete in ten traditional disciplines. (Photo by Fernando Bizerra Jr./EPA)

A Brazilian indigenous man of the Rikbaktsa tribe watches the bow and arrow competition during the XII International Games of Indigenous Peoples in Cuiaba, Mato Grosso state, Brazil on November 12, 2013. (Photo by Christophe Simon/AFP Photo)

Mamainde Indian women participate in a tug of war competition during the indigenous games in Cuiaba, Brazil, Tuesday, November 12, 2013. (Photo by Felipe Dana/AP Photo)

Brazilian indigenous people take a photograph before attending the opening ceremony of the XII Games of the Indigenous People in Cuiaba November 9, 2013. (Photo by Paulo Whitaker/Reuters)

Children from the Brazilian Umutina tribe play with bows and arrows before the visit of Brazilian Sport Minister Aldo Rebelo at the XIIth Games for Indigenous People in Cuiaba, Mato Grosso state, on 13 November, 2013 Brazil. (Photo by Christophe Simon/AFP Photo)

Children from the Brazilian Umutina tribe sing and dance before the visit of Brazilian Sport Minister Aldo Rebelo at the XIIth Games for Indigenous People in Cuiaba, Mato Grosso state, on 13 November, 2013 Brazil. (Photo by Christophe Simon/AFP Photo)