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

John Sparks / Sir David Attenborough with mountain gorillas on location for BBC series 'Life on Earth', Rwanda, Africa 1978

John Sparks / Sir David Attenborough with mountain gorillas, on location for BBC series 'Life on Earth', Rwanda, Africa 1978

John Sparks / Snow covered volcanic region of Lake Kurylski, Kamchatka, Russia

John Sparks / African elephant breeding herd (including Echo from Cynthia Moss EB family study group) Amboseli National Park, Kenya.

John Sparks / Elephants (including Echo & Ella of Cynthia Moss EB family study group) Amboseli NP, Kenya, East Africa

John Sparks / Baby elephant, Amboseli NP (from Cynthia Moss EB family study group) Kenya

John Sparks / African elephant breeding herd. Amboseli National Park, Kenya. Cynthia Moss EB family study group the subject of Echo the Elephant.

John Sparks / Lava lizard {Tropidurus sp} basking on the head of a Marine iguana {Amblyrhynchus cristatus} Galapagos

John Sparks / David Attenborough by Grand Canyon on location for BBC Life on Earth series, Arizona, USA, 1980s

John Sparks / Khirgiz man with Golden eagle used for hunting, Tien Shan

John Sparks / Brown pelican turning eggs in nest {Pelecanus occidentalis} Galapagos, South America