The indigenous peoples of the Cordillera Mountain Range of northern Luzon, Philippines are often referred to using the exonym Igorot people, or more recently, as the Cordilleran peoples. There are nine main ethnolinguistic groups whose domains are in the Cordillera Mountain Range, altogether numbering about 1.5 million people in the early 21st century. Their languages belong to the northern Luzon subgroup of Philippine languages, which in turn belongs to the Austronesian (Malayo-Polynesian) family. These ethnic groups keep or have kept until recently their traditional religion and way of life. Some live in the tropical forests of the foothills, but most live in rugged grassland and pine forest zones higher up. Etymology From the root word golot, which means "mountain," Igolot means "people from the mountains", a reference to any of various ethnic groups in the mountains of northern Luzon. During the Spanish colonial era, the term was variously recorded as Igolot, Ygolot, and Igorrote, compliant to Spanish orthography. The endonyms Ifugao or Ipugaw (also meaning "mountain people") are used more frequently by the Igorots themselves, as igorot is viewed by some as slightly pejorative, except by the Ibaloys. The Spanish borrowed the term Ifugao from the lowland Gaddang and Ibanag groups. Cordillera ethnic groups The Igorots may be roughly divided into two general subgroups: the larger group lives in the south, central and western areas, and is very adept at rice-terrace farming; the smaller group lives in the east and north. Prior to Spanish colonisation of the islands, the peoples now included under the term did not consider themselves as belonging to a single, cohesive ethnic group. Bontoc The Bontok ethnolinguistic group can be found in the central and east portions of the Mountain Province. It mainly consists of the Balangaos and Gaddangs, with a significant portion who identify as part of the Kalinga group. The Bontok live in a mountainous territory, particularly close to the Chico River and its tributaries. Mineral resources (gold, copper, limestone, gypsum) can be found in the mountain areas. Gold, in particular, has been traditionally extracted from the Bontoc municipality. The Chico River provides sand, gravel, and white clay, while the forests of Barlig and Sadanga within the area have rattan, bamboo and pine trees. They are the second largest group in the Mountain Province. The Bontoc live on the banks of the Chico River. They speak Bontoc and Ilocano. They formerly practiced head-hunting and