Jeff Wilson / Frozen Planet team tent at Lake Hoare Camp, Dry Valleys, Antarctica, December 2009. Taken on location for the BBC series, Frozen Planet.

Jeff Wilson / View through the porthole of science teams and Frozen Planet film crew working on the sea ice in the Bering Sea, Alaska, USA, March 2008. The film crew were in search of Spectacled eider ducks, temper...

Jeff Wilson / Crew member of the US coastguard ship 'Healy' standing on the sea ice in front of the ship's hull after the ship became stuck in the ice, Bering Sea, Alaska, USA, March 2008. Taken on location for the...

Jeff Wilson / Frozen planet team clothes and equipment ready for Antarctica expedition to Ross Sea, in National Science Foundation hanger, Christchurch, New Zealand, October 2009. Taken on location for BBC series,...

Jeff Wilson / Director, Chadden Hunter, standing on wind eroded rock talking on radio to base camp, Dry Valleys, Antarctica, December 2009. Taken on location for the BBC series, Frozen Planet.

Jeff Wilson / Field Assistant, Jason Roberts, standing on top of rock pinnacle, Svalbard, Spitzbergen, Norway, July 2009, Taken on location for the BBC series, Frozen Planet.

Chris Gomersall / 2020VISION / Will Bolton, 2020VISION videographer, filming at Westleton Heath, Minsmere RSPB reserve, Suffolk, UK, February 2011.

Martin Dohrn / Ammonite night filming crew on location for National Geographic Nighstalkers, Yala National Park, Sri Lanka, 2010. *THIS IMAGE CAN ONLY BE USED IF NATIONAL GEOGRAPHIC NIGHTSTALKERS IS REFERENCED*

Jeff Wilson / Film crew walking out of mountains down into Chitral valley after filming Snow leopard (Panthera uncia) Hindu Kush, Pakistan. For BBC Planet Earth series, Mountains episode, 2005

Jeff Wilson / Two Markhor (Capra falconeri) males fighting during the rut, Hindu Kush mountains, North West frontier, Pakistan, photographed whilst on location filming for BBC Planet Earth series, 2005

Jeff Wilson / Two Markhor (Capra falconeri) males fighting during the rut, Hindu Kush mountains, North West frontier, Pakistan, photographed whilst on location filming for BBC Planet Earth series, 2005

Jeff Wilson / Markhor (Capra falconeri) male on mountain side in the Hindu Kush mountains, North West frontier, Pakistan, photographed whilst on location filming for BBC Planet Earth series, 2005