The Cuyabeno River is located in Sucumbios,

Ecuador Ecuador ( ; ; Quechua: ''Ikwayur''; Shuar: ''Ecuador'' or ''Ekuatur''), officially the Republic of Ecuador ( es, República del Ecuador, which literally translates as "Republic of the Equator"; Quechua: ''Ikwadur Ripuwlika''; Shuar: ''Eku ...

. The river starts in the high part of the Cuyabeno Reserve and ends in the

Aguarico River The Aguarico River ( es, Río Aguarico, meaning "rich water") is a river in northeastern Ecuador. It is the main river of the Sucumbíos province. In the last part of its course it is the Ecuadorian-Peruvian border. It empties into the Napo Riv ...

. In the Siona - Secoya language, Cuyabeno means "Kindness River"".Reserva de Producción Faunística Cuyabeno (spanish) http://www.reservacuyabeno.org/

References

Rivers of Ecuador Upper Amazon {{Ecuador-river-stub