Remarkable footage has been released of an uncontacted indigenous man who has lived alone in an Amazon forest for at least 22 years. Semi-naked and swinging an axe vigorously as he fells a tree, the man, believed to be in his 50s, has never been filmed so clearly before.

"He has good health and a good physical shape," said Altair Algayer, a regional coordinator for the Brazilian government indigenous agency Funai, who was with the team who filmed the footage.