Hello my friend, thank you for being here. Very interesting your questions, thanks for asking them.
Yes, that small river is part of the area known as the orinoco delta, a series of streams that come from the orinoco. In this area specifically there is not much of them but a few kilometers very close to here is Tucupita capital of the Delta Amacuro State where the predominant ethnic group are the Waraos, the government has made some efforts to recognize their territory and attend the population, but honestly they have been very neglected and especially the Waraos have had to migrate from their lands forced by necessity and we see many of them in cities like Puerto Ordaz or Maturin begging.
There are some areas where they live that are respected but in general they have moved towards the populated areas and some have mixed with the rest of the population and we find Waraos anywhere in the states of Monagas, Delta Amacuro or Bolivar. I hope that answers your question, if not please ask it again.
Greetings and blessings.