Oriol Alamany / Hikers crossing a scree field in the Collada de Saburo Pass along the 'Carros de Foc' route, Aiguestortes i Estany de Sant Maurici National Park, Pyrenees, Catalonia, Spain. Model released

Oriol Alamany / Hiker crossing a scree field in the Collada de Saburo Pass along the 'Carros de Foc' route, Aiguestortes i Estany de Sant Maurici National Park, Pyrenees, Catalonia, Spain. Model released

Kristel Richard / Horse racing - Banimpire (ridden by K.J.Manning, in White and Purple) wins The Ribblesdale Stakes, over Field Of Miracles (2nd, ridden by R.Hughes in Red and White), in June 2011, on the 300th Anniver...

Jeff Wilson / Field Assistant, Jason Roberts, on top of mast looking out for submerged ice, Svalbard, Spitzbergen, Norway, July 2009. Taken on location for the BBC series, Frozen Planet.

Tim Laman / Photographer Tim Laman (foreground) and field assistant Zafer Kizilkaya explore and photograph the mangroves by kayak. Kostrae Island, Federated States of Micronesia. July 2005, model released

Tim Laman / Field Assistant Zafer Kizilkaya paddling a kayak through a mangrove channel. The forested slopes of Kosrae Island are in the background. Kostrae Island, Federated States of Micronesia. June 2005. mode...

Niall Benvie / Male Black grouse {Tetrao tetrix} displaying on lek site. Scotland, UK.

Niall Benvie / Male Black grouse {Tetrao tetrix} displaying on lek site. Scotland, UK.

Niall Benvie / Red grouse {Lagopus lagopus scoticus} standing on a rock, Scotland, UK.

Flip Nicklin / Orca researchers John Ford and Deborah Kavanagh in the field reviewing data in tent, Vancouver Island, British Columbia, Canada