The Huaorani, Waorani, or Waodani, also known as the Waos, are an Indigenous people from the Amazonian Region of Ecuador (Napo, Orellana, and Pastaza Provinces) who have marked differences from other ethnic groups from Ecuador. The alternate name Auca is a pejorative exonym used by the neighboring Quechua natives, and commonly adopted by Spanish-speakers as well. Auca (awqa in Quechua) means 'savage'.
They comprise almost 4,000 inhabitants and speak the Huaorani language, a linguistic isolate that is not known to be related to any other language.
Their ancestral lands are located between the Curaray and Napo rivers, about 50 miles (80 km) south of El Coca. These homelands—approximately 120 miles (190 km) wide and 75 to 100 miles (120 to 160 km) from north to south—are threatened by oil exploration and illegal logging practices. In the past, Huaorani were able to protect their culture and lands from both indigenous enemies and settlers by force of arms.
In the last 40 years, they have shifted from a hunting and gathering society to living mostly in permanent forest settlements. As many as five communities—the Tagaeri, the Huiñatare, the Oñamenane, and two groups of the Taromenane—have rejected all contact with the outside world and continue to move into more isolated areas.
The word Waodani (plural of Wao 'person') means 'humans' or 'men' in Wao Tiriro. Before the mid 20th century, it included only those kin associated with the speaker. Others in the ethnic group were called Waodoni, while outsiders were and are known by the derogatory term Cowodi. This structure duplicates the in-group/out-group naming conventions used by many peoples. It reflects a period of traumatic conflict with outsiders during the 19th and early 20th century rubber boom / oil exploration.
The name Waodani (or the alternative English spelling Waorani) represents a transliteration by English-speaking missionary linguists. The phonetic equivalent used by Spanish-speakers is Huaorani (reflecting the absence of w in Spanish spelling).