A Guajajara Indian "forest guardian" detains a logger during a search on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 17, 2019. REUTERS/Ueslei Marcelino

A Guajajara Indian "forest guardian" drinks water from a tree branch at a makeshift camp on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 10, 2019. REUTERS/Ueslei Marcelino

A Guajajara Indian and "forest guardian" rests inside a truck on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 12, 2019. REUTERS/Ueslei Marcelino

Guns belonging to Guajajara Indians "forest guardians" are seen in a loggers camp on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 11, 2019. REUTERS/Ueslei Marcelino

A Guajajara Indian "forest guardian" searches for illegal loggers on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 11, 2019. REUTERS/Ueslei Marcelino

A Guajajara Indian "forest guardian" sits in a car as it drives through Arariboia indigenous land during a search for illegal loggers near the city of Amarante, Maranhao state, Brazil, September 10, 2019. REUTERS/Ueslei Marcelino

A Guajajara Indian and "forest guardian" burns a truck used by loggers during a search on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 17, 2019. REUTERS/Ueslei Marcelino

A Guajajara Indian and "forest guardian" detains a logger during a search on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 17, 2019. REUTERS/Ueslei Marcelino

A Guajajara Indian "forest guardian" prepares before going to search for illegal loggers on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 10, 2019. REUTERS/Ueslei Marcelino

Guajajara Indians who call themselves "forest guardians" stand during a search for illegal loggers on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 17, 2019. REUTERS/Ueslei Marcelino

Guajajara Indians "forest guardians" detain a logger during a search for illegal loggers on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 17, 2019. REUTERS/Ueslei Marcelino

A Guajajara Indian "forest guardian" detains a logger during a search on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 17, 2019. REUTERS/Ueslei Marcelino

A logger kneels on the ground in front of a burning truck after being detained by "forest guardians" during a search for illegal loggers on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 17, 2019. REUTERS/Ueslei Marcelino

A Guajajara Indian "forest guardian" stands by a fire at a loggers camp on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 12, 2019. REUTERS/Ueslei Marcelino

A Guajajara Indian "forest guardian" holds a gun as he prepares to search for illegal loggers on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 10, 2019. REUTERS/Ueslei Marcelino

A Guajajara Indian "forest guardian" sets fire to a loggers camp on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 12, 2019. REUTERS/Ueslei Marcelino

Guajajara Indians "forest guardians" try to push a car which got stuck during a search for illegal loggers on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 12, 2019. REUTERS/Ueslei Marcelino

A Guajajara Indian "forest guardian" rests in a makeshift camp on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 10, 2019. REUTERS/Ueslei Marcelino

Guajajara Indians who call themselves "forest guardians" have a meeting whilst on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 11, 2019. REUTERS/Ueslei Marcelino

A Guajajara Indian "forest guardian" holds a gun as he prepares to search for illegal loggers on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 10, 2019. REUTERS/Ueslei Marcelino

A Guajajara Indian "forest guardian" holds a gun during a search on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 12, 2019. REUTERS/Ueslei Marcelino

A Guajajara Indian "forest guardian" cooks birds at a loggers camp on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 11, 2019. REUTERS/Ueslei Marcelino

Guajajara Indians who call themselves "forest guardians" spend time at a makeshift camp on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 10, 2019. REUTERS/Ueslei

Guajajara Indians who call themselves "forest guardians" rest during a search on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil September 13, 2019. REUTERS/Ueslei Marcelino

A Guajajara Indian "forest guardian" bathes in a river on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 10, 2019. REUTERS/Ueslei Marcelino

A Guajajara Indian "forest guardian" stands guard during a search for illegal loggers on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 17, 2019. REUTERS/Ueslei Marcelino

Guajajara Indians who call themselves "forest guardians" search the truck of a logger during a search on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 17, 2019. REUTERS/Ueslei Marcelino

A Guajajara Indian "forest guardian" lifts a tree trunk at a makeshift camp on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 10, 2019. REUTERS/Ueslei Marcelino

A Guajajara Indian and "forest guardian" burns a truck used by loggers during a search for illegal loggers on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 17, 2019. REUTERS/Ueslei Marcelino

A Guajajara Indian "forest guardian" paints his face whilst on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 10, 2019. REUTERS/Ueslei Marcelino

A Guajajara Indian "forest guardian" draws water from a well at a loggers camp on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 11, 2019. REUTERS/Ueslei Marcelino

A Guajajara Indian "forest guardian" holds a gun as he prepares to search for illegal loggers on Arariboia indigenous land near the city of Amarante, Maranhao state, Brazil, September 10, 2019. REUTERS/Ueslei Marcelino