The Mashco Piro are thought to be the largest uncontacted tribe in the world, numbering more than 750 people, according to Survival International, a nonprofit advocating Indigenous rights.
While the Jarawas and North Sentinelese remain largely uncontacted, the Shompen - some 400 people - of the Great Nicobar Islands are also at risk of losing their way of life due to external pressures.