Featured photojournalist: Ueslei Marcelino

Yawalapiti children play in the Xingu River. In August the Yawalapiti tribe will hold the quarup, which is a ritual held over several days to honour in death of a person of great importance to them. This year the quarup will honour two people – a Yawalapiti who they consider a great leader, and Darcy Ribeiro, a well-known author, anthropologist and politician known for focusing on the relationship between native people and education in Brazil Photograph: Ueslei Marcelino/Reuters

Yawalapiti men wrestle Photograph: Ueslei Marcelino/Reuters

A Yawalapiti wrestler rests in the Xingu National Park, Mato Grosso state Photograph: Ueslei Marcelino/Reuters

Yawalapiti tribe members catch fish in the Xingu National Park Photograph: Ueslei Marcelino/Reuters

Yawalapiti children climb a tree to jump into the Xingu river Photograph: Ueslei Marcelino/Reuters

Yawalapiti youth chief Anuia leads a dance in the Xingu National Park Photograph: Ueslei Marcelino/Reuters

A Yawalapiti man paints his body with a mix of annatto or achiote seeds Photograph: Ueslei Marcelino/Reuters

An aerial view of the Yawalapiti village in the Xingu National Park, Mato Grosso state, Brazil Photograph: Ueslei Marcelino/Reuters

A Yawalapiti man walks out of a hut Photograph: Ueslei Marcelino/Reuters

Yawalapiti men play urua bamboo flutes Photograph: Ueslei Marcelino/Reuters

A Yawalapiti boy dips his head into the Xingu river Photograph: Ueslei Marcelino/Reuters

Yawalapiti tribe members catch fish Photograph: Ueslei Marcelino/Reuters

A Yawalapiti man has his body painted with a mix of annatto or achiote seeds Photograph: Ueslei Marcelino/Reuters