‘Our world is full of these wild ghosts’: Werner Herzog’s new National Geographic documentary gives a rare glimpse of some of the world's most elusive animals

Steve Boyes looks at a rainbow in National Geographic's Ghost Elephants.

When Dr Steve Boyes first saw himself in Werner Herzog's new film Ghost Elephants at the Venice International Film Festival in August last year, he saw an intensity within himself that he didn't always realize was there.

The conservation biologist and National Geographic Explorer has devoted the past decade of his life to finding a mysterious, elusive herd of elephants in the highlands of Angola with such dedication that it immediately caught the attention of Herzog, who has since chronicled the epic journey in a National Geographic documentary.