Runashimi

The Napuruna, or Quijos of the Napo basin between Ecuador and Peru, once spoke a language remembered as Shillipanu and known only as guttural, bird-imitating speech. Never written down, it was displaced by Quechua spread through Inca trade and Jesuit missions, leaving only traces in later Napo Kichwa; the Quijos revolt of 1578 ended in defeat and mission resettlement.