For generations, the dense tropical rainforests of the Philippine island of Mindoro have been home to 7 tribes of people collectively called the Mangyan.
Not only are the Mangyan physically and socially isolated from the rest of the Filipino population, but they are also among the poorest and most marginalized.
Living in the dense, dark forests of Mindoro Island, which are believed to be rich in gold, gas and minerals, the Mangyan tribes are under threat from commercial exploitation.
They were once coastal dwellers, but to avoid disputes, the mild-mannered and peace-loving people gave up their land, and moved to the mountains.
They avoided religious conversion by the Spaniards, raids by Moro pirates, and the influx of recent migrants.
Some Mangyans in remote areas have conserved their traditional lifestyle - hunting with bows and arrows and gathering food.
Historically nomadic and forest gatherers, the tribes often struggle to feed themselves, particularly during the rainy season which lasts four months.
Today, many Mangyans practice small-scale and self-supporting agriculture, some make handicrafts for sale in nearby tourist areas, while others work as guides and laborers for the small local resorts and in the towns.
The most reliable work is seasonal at best; Tagalog planters employ them for "dirty work" such as cleaning the plantations from unwanted plants or even converting forests into plantations - which contributes to further reduction of their habitats.
They struggle because of limited educational opportunities in the past but are trying hard to ensure that their children receive education, health care and other benefits.
They maintain many of their traditional values such as strong village group bonding, sense of culture and community, sharing, hard work and passive nature.
Many Mangyans live in loose clusters of up to 20 bamboo huts with thatched roofs and raised floors.
Traditionally, a male at age 16 can become a family man if he can build his own house --a house is typically made from coconut leaves, bamboo, cogongrass, a tree for its pillars, and other natural materials.