John Downer / Bengal Tiger (Panthera tigris tigris) mother and cub, Pench National Park, Madhya Pradesh, India, taken on location for 'Tiger - Spy in the Jungle'

Axel Gomille / Tiger (Panthera tigris tigris) cub, Bandhavgarh National Park, India

Edwin Giesbers / Sumatran tiger (Panthera tigris sumatrae) close-up head portrait, captive

John Downer / Bengal Tigers (Panthera tigris tigris) resting in the shade national park, India, taken on location for 'Tiger - Spy in the Jungle' March 2007

John Downer / Bengal Tiger (Panthera tigris tigris) young cub, Pench National Park, Madhya Pradesh, India, taken on location for 'Tiger - Spy in the Jungle' July 2008

John Downer / Bengal Tiger (Panthera tigris tigris) juvenile female taking mud bath, Pench National Park, Madhya Pradesh, India, taken on location for 'Tiger - Spy in the Jungle' 2007

John Downer / 'Tusk cam' camera mounted onto domesticated elephant (Elephas maximus) tusk to film bengal tigers, Pench National Park, Madhya Pradesh, India, taken on location for 'Tiger - Spy in the Jungle' Decembe...

Vladimir Medvedev / Amur / Siberian Tiger (Panthera tigris altaica) female in the wild, walking down a hillside, Lazovskiy zapovednik / Lazo Reserve protected area, Primorskiy krai, Far Eastern Russia, February 2012

Vladimir Medvedev / Amur / Siberian Tiger (Panthera tigris altaica) female in the wild, near the coast, Lazovskiy zapovednik / Lazo Reserve protected area, Primorskiy krai, Far Eastern Russia, February 2012

Axel Gomille / Tiger (Panthera tigris tigris) large cub drinking at water's edge, Bandhavgarh National Park, India

Edwin Giesbers / Sumatran tiger (Panthera tigris sumatrae) close-up of eyes, captive

Andy Trowbridge / Bengal Tigers (Panthera tigris tigris) adult female drinking water, her juvenile cub beside her. Bandhavgarh National Park, India, April