Ann & Steve Toon / Dust devil in Amboseli National Park in dry season, Kenya, October 2012

XI ZHINONG / Grey wolf (Canis lupus) chasing a wounded tibetan wild ass (Equus kiang) Kekexili, Qinghai, China, December.

XI ZHINONG / Grey Wolves (Canis lupus) hunting a wounded Tibetan wild ass (Equus kiang) Kekexili, Qinghai, China, December.

XI ZHINONG / Wild yak (Bos mutus) charging and kicking up dust, Kekexili, Qinghai, China, November.

Christophe Courteau / Fighting between a pack of 21 African Wild Dogs {Lycaon pictus} and the dominant female of a clan of Spotted Hyaenas (Crocuta crocuta) Northern Okavango Delta, Botswana

Paul D Stewart / Illustration of Giant Octopus (Octopus dofleini) attacking a ship, 1815 copperplate engraving from Bertuch's 'Bilderbuch fur kinder' 16 plate 5. with contemporary colour. 'Colosal Polypus' (octopus) a...

David Pattyn / Alpine ibex (Capra ibex) adult male chasing two young males away, Gran Paradiso National Park, Italy, July

Anup Shah / African elephants (Loxodonta africana) dust bathing, Masai Mara National Reserve, Kenya, August.

Kristel Richard / A herd of Retuerta mares trotting, Guadiamar scientific reserve, Donana National Park, Andalusia, Spain. This breed of horse was close to extinction in the 1990s with only 5 individuals left, but now...

Roy Mangersnes / Bushfire and dust devils in the Central Kalahari Game Reserve, Botswana, November

Charlie Summers / Plains Zebra (Equus quagga) in a dominance fight with dust flying, Lake Magadi, Serengeti, Tanzania.

Kristel Richard / Cowboys rounding up a band of Criollo pure pedigree mares and foals, Estancia Ita Maria, Misiones, Paraguay, January 2012

Roland Seitre / African Elephant (Loxodonta africana) male with one broken tusk, feeding on grass. Tsavo National Park, Kenya, 2009.

Florian Möllers / Chinese farmers 'separating the wheat from the chaff', here with yellow peas (Pisum sativum). Zhouzhi Nature Reserve, Shaanxi, China, October 2006.

Kristel Richard / A rare Sorraia stallion cantering, Coudelaria Nacional (National Stud Farm), in Alter do Chao, District of Portalegre, Alentejo, Portugal.

Ernie Janes / Combine harvester harvesting field of Wheat, Bedfordshire, UK, August 2006

Kristel Richard / Wild / feral Dulmen ponies (Equus caballus) close up of herd of mares and foals running on the Duke of Croy's estate, Meerfelder Bruch, North Rhine-Westphalia, Germany, May 2011

Kristel Richard / Wild / feral Dulmen ponies (Equus caballus) herd of mares and foals running on the Duke of Croy's estate, Meerfelder Bruch, North Rhine-Westphalia, Germany, May 2011

Lisa Hoffner / Orphan elephant (Loxodonta africana) flings red dirt during its daily dust bath. David Sheldrick Wildlife Trust Nairobi Elephant Nursery, Kenya, April 2007.

Lisa Hoffner / Young orphan Elephants (Loxodonta africana) out on a walk. David Sheldrick Wildlife Trust Nairobi Elephant Nursery, Kenya, July 2010.

Kristel Richard / Silhouette of two traditionally dressed Indian riders, mounted on Kathiawari mares, backlit at sunset, in Gujarat, India, January 2011, Model released

Anup Shah / Eastern White-bearded Wildebeest (Connochaetes taurinus) herd running - wide angle perspective. Masai Mara National Reserve, Kenya. August

Anup Shah / Eastern White-bearded Wildebeest (Connochaetes taurinus) herd running - wide angle perspective, Masai Mara National Reserve, Kenya. August

Anup Shah / Eastern White-bearded Wildebeest (Connochaetes taurinus) herd running - wide angle perspective, Masai Mara National Reserve, Kenya. October

Anup Shah / Eastern White-bearded Wildebeest (Connochaetes taurinus) herd running - wide angle perspective, Masai Mara National Reserve, Kenya. October

Anup Shah / Eastern White-bearded Wildebeest (Connochaetes taurinus) herd running - wide angle perspective Masai Mara National Reserve, Kenya. October

Anup Shah / Eastern White-bearded Wildebeest herd (Connochaetes taurinus) and Common / Plains zebra (Equus quagga burchellii) running away from the Mara River after crossing - wide angle perspective. Masai Mara N...

Anup Shah / Common / Plains Zebra (Equus quagga burchellii) herd running away from the Mara River - wide angle perspective, Masai Mara National Reserve, Kenya. September 2009.

Anup Shah / Eastern White-bearded Wildebeest (Connochaetes taurinus) herd running, rear view, wide angle perspective, Masai Mara National Reserve, Kenya. September

Anup Shah / Eastern White-bearded Wildebeest (Connochaetes taurinus) herd running after crossing Mara river, wide angle perspective. Masai Mara National Reserve, Kenya. September

Anup Shah / Common / Plains Zebra (Equus quagga burchellii) close up view of under belly - wide angle perspective. Masai Mara National Reserve, Kenya. August

Tony Heald / Ostrich [Struthio camelus] courtship display by female, Etosha National Park, Namibia, August

Anup Shah / Eastern white-bearded wildebeest herd (Connochaetes taurinus) waiting to cross the Mara River. Masai Mara National Reserve, Kenya, October 2009

Charlie Summers / African Elephant (Loxodonta africana) baby running after the group to reunite with its mother. Etosha National Park, Namibia, Southern Africa

Charlie Summers / Burchell's Zebra (Equus quagga burchellii) herd walking towards waterhole in the late afternoon, kicking up dust as they come. Etosha National Park, Namibia, Southern Africa

Kristel Richard / Traditionally dressed Berber warriors, mounted on Barb and Arab Barb horses, galloping into battle firing their guns down during the Fantasia in Dar Es Salam, Morocco, June 2010

Christophe Courteau / Pantaneiros horsemen leading cattle and horse livestock along the Transpantaneira, Pantanal, Brazil, July 2008

Christophe Courteau / Kalahari bushmen, family playing traditional game, dry season, Central Kalahari Desert, Botswana, August 2008

Christophe Courteau / Oryx (Oryx gazella) and Ostriches (Struthio camelus) running, Etosha National Park, Namibia, August 2009

Christophe Courteau / Two African lion cubs (Panthera leo) playing on a road in the Kalahari Desert, Botswana.

Staffan Widstrand / Plains / Common Zebra (Equus quagga / burchelli), galloping through trees, silhouetted at dusk, Serengeti NP, Tanzania, East Africa, January

Staffan Widstrand / Herd of Wildebeest (Connochaetes taurinus) silhouetted at dusk, Serengeti NP, Tanzania, East Africa, January

Charlie Summers / Backlit Gemsboks (Oryx gazella gazella) at sunrise approach Etosha pan waterhole, Namibia, Southern Africa

Charlie Summers / African Elephant (Loxodonta africana) bulls in dominance fight, Mono Pools national Park, Zimbabwe, Southern Africa

Charlie Summers / Cheetah (Acinonyx jubatus) running at full speed chasing Springbok prey, Kalahari Desert, Southern Africa

Richard Du Toit / Aerial view of herd of African buffalo (Syncerus caffer) on the move, Okavango delta, Botswana

David Woodfall / Drought affected agricultural land, monsoon wind blowing top soil from fields, Madhya Pradesh, India, Asia

Kevin Schafer / Asian Elephant (Elephas maximus) throwing sand onto its back, Gibbon Wildlife Sanctuary, Assam, India

Bernard Castelein / Blackbuck (Antilope cervicapra) two males, stand off at sunrise, Rajasthan, India

Andy Rouse / Common wildebeest (Connochaetes taurinus) jumping into Mara River during migration, Masai Mara, Kenya

Andy Rouse / Common / Burchell's zebra (Equus quagga) running, kicking up dust, Masai Mara, Kenya

Andy Rouse / Common wildebeest (Connochaetes taurinus) gathering to cross river on migration, Masai Mara, Kenya

Nick Garbutt / Massing herds of White bearded wildebeest (Connochaetes taurinus albojubatus) on migration, Serengeti National Park, Tanzania

Carol Walker / Grulla Mustang stallion running in dust at Return to Freedom Sanctuary, Lompoc, California, USA

Tony Heald / Black rhinoceros (Diceros bicornis) charging, Etosha National Park, Namibia, January

Edwin Giesbers / Wildebeest (Connochaetes taurinus) herd, Tanzania

Edwin Giesbers / Wildebeest (Connochaetes taurinus) running, Tanzania

Edwin Giesbers / Wildebeest (Connochaetes taurinus) running, Tanzania

Anup Shah / Herd of Wildebeest {Connochaetes taurinus} crossing river on migration, East Africa

Carol Walker / Cowboy driving a horse at Sombrero Ranch, Craig, Colorado

Anup Shah / Wildebeest {Connochaetes taurinus} mass on migration, Serengeti NP, Tanzania

Tony Heald / Dust storm Kalahari Gemsbok NP South Africa, summer

Richard Du Toit / African Lion (Panthera leo) females hunting Cape Buffalo (Syncerus caffer) herd, Okavango Delta, Botswana

Suzi Eszterhas / Blue Wildebeest (Connochaetes taurinus) leaping into the Mara River during migration, Masai Mara National Reserve, Kenya

Richard Du Toit / Cape Buffalo (Syncerus caffer) herd, Okavango Delta, Botswana

Tony Heald / African elephant charging (Loxodonta africana) Etosha NP, Namibia

Anup Shah / Wildebeest running at sunset {Connochaetes taurinus} herd on migration, Serengeti NP, Tanzania

Anup Shah / Herd of Common Zebra {Equus quagga} running with Wildebeest calf {Connochaetes taurinus}, action kicking up dust clouds, Serengeti NP, Tanzania

Jean E. Roche / Spanish bull using dust to repel flies {Bos taurus} Camargue France

Tony Heald / African elephant dust bathing Kruger N P, South Africa

Mitsuaki Iwago / Blue Wildebeest (Connochaetes taurinus) herd in dust, Serengeti National Park, Tanzania

Mitsuaki Iwago / African Lion (Panthera leo) female stalking Blue Wildebeest (Connochaetes taurinus) herd, Serengeti National Park, Tanzania

Jim Brandenburg / African Elephant (Loxodonta africana) group taking dust bath, Namibia

Jim Brandenburg / African Elephant (Loxodonta africana) taking a dust bath, Etosha National Park, Namibia

Richard Du Toit / African elephant sprays itself with mud {Loxodonta africana} Linyanti, Botswana, Southern Africa. The mud-pack, when dry, forms a hard crust that deters insect attacks.

Rolf Nussbaumer / Scaled quail pair dust bathing {Callipepla squamata} Texas, USA

Peter Blackwell / Common zebra rolling at sunset / dusk {Equus quagga} Amboseli NP, Kenya, East Africa

Yva Momatiuk & John Eastcott / Mustang (Equus caballus) mare and her foal flee danger in cloud of dust in the summer season, Wyoming

Mitsuaki Iwago / Blue Wildebeest (Connochaetes taurinus) herd descending cliff during migration, Serengeti

Jim Brandenburg / American Bison (Bison bison) herd stampeding, South Dakota

Jim Brandenburg / American Bison (Bison bison) herd stampeding, South Dakota

Jim Brandenburg / American Bison (Bison bison) herd stampeding, South Dakota

Jim Brandenburg / American Bison (Bison bison) herd stampeding, South Dakota

Anup Shah / Common zebras running {Equus quagga} Masai Mara, Kenya

Anup Shah / Common zebras running {Equus quagga} Masai Mara, Kenya

GRANT MCDOWELL / Dust storm preceeding thunderstorm in the Sahel, Mali NB Person watching

Anup Shah / Common zebra herd running {Equus quagga} Masai Mara, Kenya

Anup Shah / Baby African elephant dust bathing {Loxodonta africana}, Masai Mara GR, Kenya

Anup Shah / Baby African elephant walking with adult {Loxodonta africana}, Masai Mara GR, Kenya

Tony Heald / Wildebeest {Connochaetes taurinus} running over dusty ground, Kgaladi Transfrontier / Kalahari Gemsbok NP, South Africa

Anup Shah / Common zebra rolling on back having dust bath {Equus quagga} Masai Mara NR Kenya

Anup Shah / Common zebra on the run kicking up dust {Equus quagga} Serengeti NP Tanzania

John Downer / Male Lion walking towards camera {Panthera leo} Masai Mara, Kenya

Denis-Huot / African Elephant (Loxodonta africana) male dust bathing. Amboseli National Park, Kenya.