The movie shows a herd of Asian water buffalo in the Amazon Basin. The buffalo are not native to South America. They are from Southeast Asia and India.
The scene after Rock Dean (John Bromfield) kills a python with his machete and then wipes the blood off the knife, is the same blood wiping scene after killing the leopard.
Dean and Romar are supposedly exploring the Amazon. In a later scene they pass the magnificent Iguazu Falls -- which are on the Brazil-Argentine border, far to the south, nowhere near the Amazon.