Estero Zamorano is a stream located in the O'Higgins Region of central Chile, situated at approximately 34°24′51.8″S, 71°10′44.4″W. This central Chilean waterway flows through a Mediterranean-climate landscape characterized by seasonal water fluctuations, riparian vegetation, and wetland habitats that support a diverse array of aquatic and bird life. The surrounding terrain features sclerophyllous forests and thorny woodlands dominated by native species such as boldo (Peumus boldus) and espino (Acacia caven), which stabilize the banks and provide important habitat structure along the stream corridor. Reeds and wetland vegetation further define the estero's character, creating a productive ecosystem that draws both wildlife and anglers to its banks.