The presence of *E. notaeus* is strongly tied to the drainage basins of which two major South American rivers?
Answer
Paraguay and Paraná rivers
The geographical distribution of the yellow anaconda is closely linked to specific hydrological networks in South America. The species thrives within the floodplains and swamps, particularly those associated with the drainage systems of the Paraguay River and the Paraná River. This region encompasses parts of Bolivia, Brazil, and Paraguay. The ecological success and evolutionary trajectory of *E. notaeus* are intrinsically connected to the existence and characteristics of these massive, interconnected wetland systems, which provide the necessary environment for their specialized aquatic lifestyle.
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