MACUXI INDIGENOUS PEOPLE, Amazon, near Boavista, northern Brazil, South America. Macuxi indians involved in long hard process extracting flour from yam root. Traditional carbohydrate staple food for tortillas and other foods. Ecological biosphere and fragile ecosystem where flora and fauna, and native lifestyles are threatened by progress and development. The rainforest is home to many plants and animals who are endangered or facing extinction. This region is home to indigenous primitive and tribal peoples including the Yanomami and Macuxi.