John Sparks / David Attenborough with mountain gorillas, on location during filming for BBC 'Life on Earth' series in Rwanda 1978

Martha Holmes / BBC field camp at Cape Washington Antarctica (for filming Blue Planet)

Paul Williams / Ocelot (Leopardus pardalis) high up in tree, Costa Rica, Central America, 2016. Filmed for the BBC series 'Big Cats'.

Mark MacEwen / Angel Falls, the world's highest uninterrupted waterfall with a fall of 807m, flowing from Auyan-tepui, a table-top mountain. Helicopter used in filming at base of waterfall with people beside it....

Stefan Christmann / Member of BBC Dynasties crew photographing on sea ice in light of full moon, during polar night. Atka Bay, Antarctica. July 2017.

Stefan Christmann / Cameraman Lindsay McCrae on ice overlooking Southern Ocean, filming for BBC Dynasties Penguin programme. Atka Bay, Antarctica. March 2017.

Stefan Christmann / Cameraman Lindsay McCrae on sea ice filming frozen landscape and icebergfor BBC Dynasties Penguin programme. Atka Bay, Antarctica. October 2017.

Stefan Christmann / Cameraman Lindsay McCrae filming Emperor penguin (Aptenodytes forsteri) colony for BBC Dynasties Penguin programme. Chicks are on sea ice whilst parents fish at sea. Atka Bay, Antarctica. December 201...

Huw Cordey / Sir David Attenborough recording voice over for BBC series, The Hunt. September 2015.

Will Burrard-Lucas / Ethiopian wolves (Canis simensis) individual from the BBC pack greeting each other after returning from hunting, Ethiopia.

Theo Webb / Female Bonobo (Pan paniscus) resting, Max Planck research site LuiKotale in Salonga National Park, Democratic Republic of Congo.

Theo Webb / Bonobo (Pan paniscus) lying in a day nest, Max Planck research site, LuiKotale, Salonga National Park, Democratic Republic of Congo.

Theo Webb / Driver ant (Dorylus) large soldier guarding smaller ants, in Salonga National Park, Democratic Republic of Congo.

Theo Webb / Bengal tiger (Panthera tigris) cubs following their mother, Bandhavgarh National Park, India.

Theo Webb / Bengal Tiger (Panthera tigris) six month old cub jumping on its mother, Bandhavgarh National Park, India.

Theo Webb / Male Indian peafowl (Pavo cristatus) displaying to attract a female, Bandhavgarh National Park, India.

Theo Webb / Bonobo (Pan paniscus) baby, Max Planck research site LuiKotale in Salonga National Park, Democratic Republic of Congo.

Theo Webb / Female Bonobo (Pan paniscus) tickling her infant, Max Planck research site LuiKotale, Salonga National Park, Democratic Republic of Congo.

Theo Webb / Female Bonobo (Pan paniscus) resting with her infant, Max Planck research site LuiKotale in Salonga National Park, Democratic Republic of Congo.

Theo Webb / Bonobo (Pan paniscus) baby sitting next to its mother, Max Planck research site, LuiKotale, Salonga National Park, Democratic Republic of Congo.

Paul Williams / Spectral tarsier (Tarsius tarsier) returning to sleep in fig tree after a night hunting, Tangkoko, Sulawesi, Indonesia.

Paul Williams / Javan slow loris (Nycticebus javanicus) rescued by Jakarta Animal Aid Network (JAAN), in holding cage, Animal rescue centre, Jakarta, Indonesia. Critically Endangered. Post production to remove light...

Paul Williams / Red leaf monkey (Presbytis rubicunda) mother holding baby, Danum Valley, Sabah, Borneo, Malaysia August.

Paul Williams / View from plane of landscape between Alice Springs and Perth, Australia, November.

Hugh Pearson / Leopard (Panthera pardus) resting, Erindi Game Reserve, Namibia.

Mark MacEwen / Japanese macaque (Macaca fuscata) relaxing in hot spring in Jigokudani, Yaenkoen, Nagano, Japan, February.

Mark MacEwen / Japanese macaque (Macaca fuscata) sleeping at hot spring in Jigokudani, Yaenkoen, Nagano, Japan, February.

Felicity Lanchester,Felicity Lanchester / View of a BBC filming camp at night, on location for the Sahara episode of the 'Africa' series, Egypt, September 2011.

Barrie Britton / King Penguin (Aptenodytes patagonicus) colony, with mountains reflected in the ocean, St Andrew's Bay, South Georgia. Photograph taken on location for the BBC Frozen Planet series, October 2009.

Barrie Britton / Southern Giant Petrel (Macronectes giganteus), St Andrew's Bay, South Georgia. Photograph taken on location for the BBC Frozen Planet series, October 2009.

Barrie Britton / Wasp (Ropalidia species) which attacks tadpoles. Association Mitsinjo Reserve, Andasibe, Madagascar. Photograph taken on location for BBC 'Wild Madagascar' Series, February 2010

Barrie Britton / Wasp (Ropalidia species) attacking Mantellid Frog Tadpoles (Guibemantis species) on leaf overhanging pond. Tadpoles escape by dropping into water. Association Mitsinjo Reserve, Andasibe, Madagascar....

Barrie Britton / Mantellid Frog Tadpoles (Guibemantis species) developing on leaf overhanging pond. Association Mitsinjo Reserve, Andasibe, Madagascar. Photograph taken on location for BBC 'Wild Madagascar' Series,...

Barrie Britton / Male Panther Chameleons (Furcifer pardalis) fighting. Nosy Be, Madagascar. Photograph taken on location for BBC 'Wild Madagascar' Series, January 2010

Barrie Britton / Nosy Be Pygmy Leaf Chameleon (Brookesia minima) female, the world's second smallest reptile species, Nosy Be, Madagascar. Photograph taken on location for BBC 'Wild Madagascar' Series, January 2010

Barrie Britton / Ring-tailed Lemur (Lemur catta) mother and baby Berenty, Madagascar. Photograph taken on location for BBC 'Wild Madagascar' Series, September 2009.

Barrie Britton / Baobab tree (Adansonia rubrostipa) Tsimanampetsotsa National Park, Madagascar. Photograph taken on location for BBC 'Wild Madagascar' Series, August 2009.

Barrie Britton / Flooded forest, Loango National Park, Gabon. Photograph taken on location for BBC 'Africa' series, January 2011.

Barrie Britton / Conifer tree bent under the weight of snow, Kuntivaara, Finland. Photograph taken on location for BBC Frozen Planet series, March 2010

Barrie Britton / Snow covered fishing boats in Sitka Harbour, Alaska. Photograph taken on location for BBC TV series 'Nature's Great Events', March 2008.

Doug Allan / Killer Whales (Orcinus orca) spy-hopping to observe Weddell Seal (Leptonychotes weddellii) in preparation to knock it from the ice by creating a wave. Marguerite Bay, Antarctic Peninsula, summer. Free...

Chadden Hunter / Brinicles (brine icicles or ice stalactites) forming under the ice, growing towards the sea floor, Ross Sea, McMurdo Sound, Antarctica. Taken on location for 'Winter' episode of the BBC Frozen Planet...

Kathryn Jeffs / Southern elephant seal pup (Mirounga leonina), Antarctica, February, Taken on location for BBC Frozen Planet series

Kathryn Jeffs / Rainbow off Antarctica, February 2009, Taken on location for BBC Frozen Planet series

Kathryn Jeffs / Tracks in snow of Adelie penguins (Pygoscelis adeliae) walking from coast to colony, Fish Island, Antarctica, February 2009, Taken on location for BBC Frozen Planet series

Kathryn Jeffs / Cliff at edge of tabular iceberg, Antarctica, February 2009, Taken on location for BBC Frozen Planet series

Kathryn Jeffs / Camera lens view of the 'Golden Fleece' in the centre of a horseshoe shaped iceberg off the Antarctic Peninsula, Antarctica, February 2009, Taken on location for BBC Frozen Planet series

Kathryn Jeffs / Iceberg off the Antarctic Peninsula, Antarctica, February 2009, Taken on location for BBC Frozen Planet series