Unblinking red eyes glide along the silent black surface of the tropical river like faintly glowing embers in the dusk. Up to seven meters long and weighing more than one ton, the black caiman is one of the largest predators in the Americas.

An alarm call goes out and monkeys of all types throw themselves off branches and out of trees to hide in terror. Overhead a giant eagle easily twists and turns through the treetops, hunting for any animal caught out in the open; the Harpy eagle hunts.