Jeff Wilson / Rear view of pilots and Trango towers in the Karakoram Mountains, Himalayas, Pakistan, from Pakistani military helicopter, for BBC series Planet Earth. April 2005

Hugh Pearson / Aerial of Mount Namuli taken from within helicopter, Mount Namuli, Mozambique, May 2011.

Ingo Arndt / Food and Agriculture Organization (FAO) helicopter pilot Eric Gadot, an expert at locust control operations flying over effected area, near Miandrivazo, Madagascar. December 2013.

Pete Oxford / Helicopter pilot flying over Elephant (Loxodonta africana) herd. The Elephants were about to be darted for relocation to the reserve they had escaped from. Zimbabwe, November 2013.

Pete Oxford / Helicopter pilot flying over Elephant (Loxodonta africana) herd. The Elephants were about to be darted for relocation to the reserve they had escaped from. Zimbabwe, November 2013.

Tim Laman / Anand Varma (left) and photographerTim Laman aboard a helicopter flying west of Yasuni National Park, Francisco de Orellana Province, Ecuador, July.

Martha Holmes / Interior of Royal Navy helicopter showing pilots. Antarctic Peninsula. February 2008. Taken on location for BBC tv series 'Life'

Tim Laman / Foja Mountains expedition members planning their drop location with helicopter pilots. Kwerba Village, Papua, Indonesia, 2008. (taken during Conservation International Rapid Assessment Program expedit...

Jeff Wilson / Rear view of pilots and glacier in the Karakoram Mountains, Himalayas, Pakistan, from Pakistani military helicopter, for BBC series Planet Earth. April 2005