John Downer / Bengal Tiger (Panthera tigris tigris) group resting in the shade, filmed by domesticated Asian elephant (Elephas maximas) holding 'Trunk cam' camera and with film-makers riding on its back. Pench Nati...

John Downer / Log cam - camouflaged camera used for filming Bengal Tigers, Pench National Park, Madhya Pradesh, India, taken on location for 'Tiger - Spy in the Jungle' March 2007

John Downer / 'Iceberg cam' remote camera used for filming polar bears, Svalbard, Norway, taken on location for 'Polar Bear : Spy on the Ice' August 2010

John Downer / 'Iceberg cam' remote camera used for filming polar bears, Svalbard, Norway, taken on location for 'Polar Bear : Spy on the Ice' August 2010

John Downer / Polar bear (Ursus maritimus) walking along ice with 'Iceberg cam' remote camera filming, Svalbard, Norway, taken on location for 'Polar Bear : Spy on the Ice' August 2010

John Downer / 'Trunk cam' remote camera held in the trunk of domesticated elephant (Elephas maximus) tusk to film Bengal tigers, Pench National Park, Madhya Pradesh, India, taken on location for 'Tiger - Spy in the...

John Downer / Bengal Tigers (Panthera tigris tigris) resting, filmed by 'log-cam' remote camera controlled from domesticated Asian Elephant (Elephas maximas) Pench National Park, Madhya Pradesh, India, taken on lo...

John Downer / Bengal Tigers (Panthera tigris tigris) resting, filmed by 'log-cam' remote camera controlled from domesticated Asian Elephant (Elephas maximas) Pench National Park, Madhya Pradesh, India, taken on lo...

John Downer / Bengal Tiger (Panthera tigris tigris) filmed by 'log cam' remote camera, Pench National Park, Madhya Pradesh, India, taken on location for 'Tiger - Spy in the Jungle' 2007

John Downer / Bengal Tigers (Panthera tigris tigris) sleeping, filmed by 'Log cam' remote camera, Pench National Park, Madhya Pradesh, India, taken on location for 'Tiger - Spy in the Jungle' 2007

John Downer / Bengal Tigers (Panthera tigris tigris) resting, filmed by 'Log cam' remote camera, with domesticated Indian elephant (Elephas maximas) in the fore-ground, Pench National Park, Madhya Pradesh, India, t...

John Downer / Bengal Tiger (Panthera tigris tigris) juvenile female resting with 'log cam' a remote camera in the foreground filming, Pench National Park, Madhya Pradesh, India, taken on location for 'Tiger - Spy i...

John Downer / Iceberg cam - remote camera used for filming polar bears, Svalbard, Norway, taken on location for 'Polar Bear : Spy on the Ice' August 2010

John Downer / 'Blizzard cam' a remote camera for filming polar bears, Svalbard, Norway, taken on location for 'Polar Bear : Spy on the Ice' August 2010

John Downer / 'Iceberg cam' remote camera used for filming polar bears, Svalbard, Norway, taken on location for 'Polar Bear : Spy on the Ice' August 2010

John Downer / Polar bear (Ursus maritimus) sleeping whilst filmed by 'Iceberg cam' Svalbard, Norway, taken on location for 'Polar Bear : Spy on the Ice' August 2010

John Downer / Bengal Tiger (Panthera tigris tigris) mother and cubs resting, whilst approached by domesticated elephant (Elephas maximas) with 'Tusk Cam' for filming, Pench National Park, Madhya Pradesh, India, tak...