 The patrilineal Ona and the composite band society Yahgan reacted very differently to the Europeans and it has been suggested that this was due to these facets of their cultural structure.The principal differences in language, habitat, and adaptation techniques did not promote contacts, although eastern Yámana groups had exchange contacts with the Selk'nam.The languages spoken by the Fuegians are all extinct, with the exception of the Yaghan language and Kawesqar.