Bertie travels to Patagonia to film the "Ghost of the Andes" puma.
Bertie Gregory searches for deadly wave-washing killer whales in Antarctica.
Bertie tracks and films African wild dogs, one of the world's top predators.
Bertie traverses the Galapagos to film three unique animal behaviors.
Bertie travels to the Congo Basin in search of an elusive forest elephant.
Bertie searches the islands of Indonesia for an elusive devil ray.
