The Casiquiare river (Spanish pronunciation: [kasiˈkjaɾe]) is a distributary of the upper Orinoco flowing southward into the Rio Negro, in Venezuela, South...

from the point of view of renewable natural resources. The Rio or Brazo Casiquiare is unique in the world, as it is a natural derivation of the Orinoco...

it splits into two; one-third of its flow passes through the Brazo Casiquiare (Casiquiare Channel) into a tributary of the Amazon, and the remainder passes...

Colombian–Venezuelan border. Below its junction near San Carlos de Río Negro with the Brazo Casiquiare, a natural waterway that brings water from the Orinoco River in Venezuela...