Benjamin Barthelemy,Benjamin Barthelemy / Ibex (Capra Ibex) fighting, Aiguilles Rouges National Nature Reserve, Haute-Savoie, France, June

Ole Jorgen Liodden / Arctic tern (Sterna paradisaea) attacking an Arctic Fox (Vulpes / Alopex lagopus) protecting its nest site, Spitsbergen, Svalbard, Norway. Highly commended, MAMMALS, GDT 2011 competition

Marie Read / American avocets (Recurvirostra americana) two during aggressive (territorial) encounter, Bear River Migratory Bird Refuge, Utah, USA, May.

Marie Read / Canada geese (Branta canadensis) two during territorial fight in early spring, Ithaca. New York, USA

Marie Read / Western Grebe (Aechmorphus occidentalis), pair during 'rushing' courtship display in which they run across water's surface in synchrony, near Escondido, California, USA, January.

Klein & Hubert / Male Ostrich (Struthio camelus massaicus) running, Kenya.,

Klein & Hubert / Male Ostrich (Struthio camelus massaicus) running, Kenya.,

Klein & Hubert / Grants zebra (Equus quagga boehmi) foal running in savanna. Kenya.

Klein & Hubert / Wirehaired Dachshund running on snow, Haute-Savoie, Alps, France.

Klein & Hubert / Cotentin donkey foal running, France.

Andy Rouse / Bengal tiger (Panthera tigris tigris) 11 month cubs play fighting, Ranthambhore National Park, India.

Andy Rouse / Bengal tiger (Panthera tigris tigris) 11 month cubs play fighting, Ranthambhore National Park, India.

Andy Rouse / Bengal tiger (Panthera tigris tigris) 11 month old cubs play fighting, Ranthambhore National Park, India.

Andy Rouse / Bengal tiger (Panthera tigris tigris) 11 month cubs play fighting, Ranthambhore National Park, India.

David Pattyn / Black necked grebe (Podiceps nigricollis) adult bird running over the water surface as a part of the courtship rituals.The Netherlands. April 2014

Denis-Huot / Nile crocodile (Crocodylus niloticus) lunging at Thomson's gazelle (Eudorcas thomsonii) in water, Mara river, Masai-Mara game reserve, Kenya.

Roland Seitre / Arabian wolf (Canis lupus arabs) running over sand. Captive, occurs in Israel, Iraq, Oman, Yemen, Jordan and Saudi Arabia.

Roland Seitre / Arabian wolf (Canis lupus arabs) running. Captive, occurs in Israel, Iraq, Oman, Yemen, Jordan and Saudi Arabia.

Richard Robinson / William Trubridge diving - a world champion free diver who is campaigning to protect the Critically Endangered Maui's dolphin (Cephalorhynchus hectori maui) endemic to New Zealand. January 2008. Edi...

Yukihiro Fukuda / Feral domestic rabbit (Oryctolagus cuniculus) running in puddle, Okunojima Island, also known as Rabbit Island, Hiroshima, Japan.

Stephen Dalton / Jumping spider (Philaeus chrysops) jumping, Corfu, Greece, sequence 3 of 4

Eric Baccega / Black flat-coated retriever dog splashing in water and retrieving stick (Canis familiaris)

Erlend Haarberg / Stoat (Mustela erminea) in white winter coat running. Vauldalen, Sor-Trondelag, Norway, May.

Erlend Haarberg / Stoat (Mustela erminea) in white winter coat, running. Vauldalen, Sor-Trondelag, Norway, May.

Erlend Haarberg / Stoat (Mustela erminea) in white winter coat, running. Vauldalen, Sor-Trondelag, Norway, May.

Erlend Haarberg / Stoat (Mustela erminea) in white winter coat, running. Vauldalen, Sor-Trondelag, Norway, May.

Erlend Haarberg / Stoat (Mustela erminea) in white winter coat, running. Vauldalen, Sor-Trondelag, Norway, April.

Anup Shah / Eastern white-bearded wildebeest (Connochaetes taurinus) herd running. Masai Mara National Reserve, Kenya. Taken with remote wide angle camera.

Anup Shah / Eastern white-bearded wildebeest (Connochaetes taurinus) herd running. Masai Mara National Reserve, Kenya. Taken with remote wide angle camera.

Anup Shah / Common or plains zebra (Equus quagga burchelli) and Eastern white-bearded wildebeest (Connochaetes taurinus) mixed herd running. Masai Mara National Reserve, Kenya. Taken with remote wide angle camera...

Anup Shah / Eastern white-bearded wildebeest (Connochaetes taurinus) herd running. Masai Mara National Reserve, Kenya. Taken with remote wide angle camera.

Anup Shah / Eastern white-bearded wildebeest (Connochaetes taurinus) herd running. Masai Mara National Reserve, Kenya. Taken with remote wide angle camera.

Anup Shah / Eastern white-bearded wildebeest (Connochaetes taurinus) herd running. Masai Mara National Reserve, Kenya. Taken with remote wide angle camera.

Anup Shah / Eastern white-bearded wildebeest (Connochaetes taurinus) herd running. Masai Mara National Reserve, Kenya. Taken with remote wide angle camera.

Anup Shah / Eastern white-bearded wildebeest (Connochaetes taurinus) herd running. Masai Mara National Reserve, Kenya. Taken with remote wide angle camera.

Anup Shah / Common or Plains zebra herd crossing the Mara River - wide angle perspective (Equus quagga burchellii). Masai Mara National Reserve, Kenya. Taken with remote wide angle camera.

Anup Shah / Eastern white-bearded wildebeest (Connochaetes taurinus) herd crossing the Mara River watched by tourists. Masai Mara National Reserve, Kenya. Taken with remote wide angle camera.

Graham Eaton / Salmon / Trout fish (Salmo sp) jumping a waterfall on the Afon Lledr, Betws Y Coed, Wales, October

Andy Trowbridge / Arctic Fox (Alopex / Vulpes lagopus) running along ridge, backlit, during moult from grey summer fur to winter white. Dovrefjell National Park, Norway, September.

Andy Trowbridge / Arctic Fox (Alopex / Vulpes lagopus) hunting in fresh snow, during moult from grey summer fur to winter white. Dovrefjell National Park, Norway, September.

Andy Trowbridge / Arctic Fox (Alopex / Vulpes lagopus) running low to the ground, during moult from grey summer fur to winter white. Dovrefjell National Park, Norway, September.

Inaki Relanzon / Ring-tailed lemur (Lemur catta) Anja Private Reserve, near Ambalavao, Central Madagascar.

Roger Powell / Rear view of Ruff (Philomachus pugnax) in full display at the lek. Varanger, Finmark, Norway, May.

Roger Powell / Satellite male Ruff (Philomachus pugnax) in full display at the lek. Varanger, Finmark, Norway, May.

Mark Taylor / Ginger kitten leaping towards a Pug puppy. Digital composite. NOT AVAILABLE FOR BOOK USE

Adrian Davies / Anti-fracking protest, sign attached to hedge, Balcombe, West Sussex, England. 19th August 2013.

Jean E. Roche / Man leaping over bull in European Bullfighting Championship 2012, Arenes d'Arles, Camargue, France, September 2012.

Jean E. Roche / Bull run, with Camargue bulls leaping over hay bales, Camargue, France, July 2012.