Kim Taylor / Bachacs / Leafcutter ants {Atta cephalotes} carrying sections of Cocoa leaf bearing 'riders' thought to ward off parasitic flies which would otherwise lay their eggs on the pieces of leaf. Trinidad, W...

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

Kristel Richard / Young police riders training on horses at sunrise, Bhavnagar Police Station, Gujarat, India, January 2011

Kristel Richard / Two riders on horses (Equus caballus) from the Gremio di Falegnamii, dressed in traditional costume, parade before the start of the Sartiglia (race to the star) in Oristano, Sardinia, Italy. February...

David Tipling / Eagle hunters with golden eagles (Aquila chrysaetos) on route to the Eagle Hunters festival near Ulgii Western Mongolia, October 2009. Winner of the Indigenous Cultures Award in Nature's Best Competit...

Jabruson / African elephants crossing river with riders. Democratic Republic of Congo, Garamba National Park.

Kristel Richard / Traditionally dressed riders parading during the Madonna dei Martiri festival, in Fonni, Nuoro district, Sardinia, Italy.

Kristel Richard / Traditionally dressed riders parading during the Madonna dei Martiri festival, in Fonni, Nuoro district, Sardinia, Italy.

Kristel Richard / Traditionally dressed riders parading during the Madonna dei Martiri festival, in Fonni, Nuoro district, Sardinia, Italy.

Kristel Richard / Traditionally dressed riders parading during the Madonna dei Martiri festival, in Fonni, Nuoro district, Sardinia, Italy.

Benoit Stichelbaut / Horse rider on the beach at Trepasses Bay, Brittany, France, October 2007.

Benoit Stichelbaut / Horse rider on beach at Trepasses Bay, with Cape Sizun, the Pointe du Raz and La Veille Lighthouse. October 2007.

Ernie Janes / Two horse riders on Holkham Beach National Nature Reserve, North Norfolk, UK, September

Ernie Janes / Dromedary Camels (Camelus dromedarius) with riders at dawn. Erg Chebbi Dunes, Sahara Desert, Morocco, North Africa, March.

Kristel Richard / Traditionally dressed riders, mounted bareback on Kathiawari mares followed by their foals, reflected in water, Gujarat, India, January 2011

Kristel Richard / Traditionally dressed riders, mounted bareback on Kathiawari mares followed by their foals, reflected in water, Gujarat, India, January 2011

Kristel Richard / Two traditionally dresed riders, mounted on Kathiawari mares, Gujarat, India, January 2011, Model released

Shattil & Rozinski / Horses (Equus caballus) and riders on a trail, Wyoming, USA, North America

Kristel Richard / Portrait of two masked riders on horses (Equus caballus) from the Gremio di Falegnami parades before the start of the 'Sartiglia' (race to the star) in Oristano, Sardinia, Italy. February 2010

Kristel Richard / Horses (Equus caballus) and riders from the Gremio dei Contadini before the 'Sartiglia' (race to the star) in Oristano, Sardinia, Italy. February 2010

Kristel Richard / Horses (Equus caballus) and riders from the Gremio dei Contadini performing acrobatics for the gathered crowds, after the 'Sartiglia' (race to the star) in Oristano, Sardinia, Italy. February 2010

Kristel Richard / Horses (Equus caballus) and riders from the Gremio dei Contadini performing acrobatics for the gathered crowds, after the 'Sartiglia' (race to the star) in Oristano, Sardinia, Italy. February 2010

Kristel Richard / Riders following the Thurlow Hunt, Suffolk, England, United Kingdom. 2009

Jean E. Roche / Traditional game played by runners and mounted riders chasing young cattle, Sambuc, Camargue, France, July 2008

Jean E. Roche / Traditional game played by runners and mounted riders chasing young cattle, Sambuc, Camargue, France, July 2008

Jean E. Roche / Traditional game played by runners and mounted riders chasing young cattle, Sambuc, Camargue, France, July 2008

Jean E. Roche / Traditional "Abrivado" game, in which riders herd bulls into an enclosure while men on foot try to distract the horses and allow the bulls to escape, Sambuc, Camargue, France, July 2008

Jean E. Roche / Traditional "Abrivado" game, in which riders herd bulls into an enclosure while men on foot try to distract the horses and allow the bulls to escape, Camargue, France, June 2008

Jean E. Roche / Traditional "Abrivado" game, in which riders herd bulls into an enclosure while men on foot try to distract the horses and allow the bulls to escape, Camargue, France, June 2008

Jean E. Roche / Traditional "Abrivado" game, in which riders herd bulls into an enclosure while men on foot try to distract the horses and allow the bulls to escape, Camargue, France, June 2008

Kristel Richard / The field of riders ride across the rolling open landscapes at the opening meet of the Quorn Hunt, in Leicestershire, England, UK. October 2009

Kristel Richard / Two riders (gauchos) try to catch up a wild horse (Equus caballus) that has thrown its rider during the rodeo in the Fiesta de la Patria Grande, Montevideo, Uruguay, April 2008

Kristel Richard / Two riders come to the rescue of a gaucho (cowboy) who is stuck on the back of a wild horse (Equus caballus) in the rodeo during the Fiesta de la Patria Grande, Montevideo, Uruguay, April 2008

Kristel Richard / Two riders come to the rescue of a gaucho (cowboy) who is stuck on the back of a wild horse (Equus caballus) in the rodeo during the Fiesta de la Patria Grande, Montevideo, Uruguay, April 2008

Kristel Richard / Two riders take out of the arena a wild horse (Equus caballus) during the rodeo of the Fiesta De La Patria Gaucha, Tacuarembo, Uruguay, April 2008

Kristel Richard / Two riders come to the rescue of a gaucho (cowboy) who is stuck on the back of a wild horse (Equus caballus) in the rodeo during the Fiesta de la Patria Gaucha, Tacuarembo, Uruguay, April 2008

Kristel Richard / Two riders (gauchos) bring a wild horse (Equus caballus) to tie him to a wooden post in preparation of the rodeo during the Fiesta De La Patria Gaucha, Tacuarembo, Uruguay, April 2008

Kristel Richard / Two riders (gauchos) bring a wild horse (Equus caballus) to tie him to a wooden post in preparation of the rodeo during the Fiesta De La Patria Gaucha, Tacuarembo, Uruguay, April 2008

Kristel Richard / Two riders lassoo a bull outside the arena during the Extreme Bull competition, in Cody, Wyoming, USA, 2009

Kristel Richard / Il Capitano del Gruppo del Commune (the captain of the group of the communes), on the grey horse, and his riders, all dressed in white and red, open the Palio, on the third Sunday of September, in Ast...

Kristel Richard / Seven Fantini (jockeys), in the colours of a particular district of Asti, take it easy at the start of one the team trials on the Saturday before the Palio, Asti, Piedmont, Italy. The cord which is le...

Kristel Richard / Two riders open the Corrida de Rejones at a bullfight in the Plaza De Toros, Jerez De La Frontera, Andalusia, Spain. 2009

Steven David Miller / Two camels with riders at the International Australasian Marree Camel Races which forms part of a camel race circuit throughout the outback, Marree, South Australia, 2007

Inaki Relanzon / Icelandic horses and riders, riding near Landmannalaugar, Iceland

Inaki Relanzon / Icelandic horses and riders, riding near Landmannalaugar, Iceland

Nick Turner / Horses and riders checking the map outside the Three Horseshoes Pub on a horseriding holiday, Brecon Beacons National Park, Po-wys, Wales, UK, Model released

Nick Turner / Horses and riders relaxing outside the Three Horseshoes Pub on a horse-riding holiday, Brecon Beacons National Park, Powys, Wales, UK, Model released

Nick Turner / Horses and riders checking map outside the Three Horseshoes Pub on a horse-riding holiday, Brecon Beacons National Park, Powys, Wales, UK, Model released

Nick Turner / Horses and riders relaxing outside the Three Horseshoes Pub on a horse-riding trekking holiday, Brecon Beacons National Park, Powys, Wales, UK, Model released

Nick Turner / Horses and riders relaxing outside the Three Horseshoes Pub on a horse-riding holiday, Brecon Beacons National Park, Powys, Wales, UK, Model released

Nick Turner / Horses and riders relaxing outside the Three Horseshoes Pub on a horse-riding holiday, Brecon Beacons National Park, Powys, Wales, UK, Model released

Peter Lewis / Horse riders on Shell Bay, Studland, Dorset, UK

Kim Taylor / Bachacs / Leaf-cutter ants {Atta cephalotes} carrying sections of Cocoa leaf bearing 'riders' thought to ward off parasitic flies which would otherwise lay their eggs on the pieces of leaf. Trinidad,...

Kim Taylor / Bachacs / Leaf-cutter ants {Atta cephalotes} carrying sections of Cocoa leaf bearing 'riders' thought to ward off parasitic flies which would otherwise lay their eggs on the pieces of leaf. Trinidad,...

Brent Hedges / Camel riders on beach at sunset, Broome, Western Australia

Martha Holmes / Mongolian riders on steppe, Hangay mountains, Mongolia.

Pete Oxford / Chagras horsemen from Atillo Village near Sangay National Park. Typical houses made from Paramo grass. Ropes, also made from the grass, are hung over the roof to keep the grass in place in high winds....

Jean E. Roche / Traditional riders on white horses in the Camargue, France

Jean E. Roche / Bulls and horsemen at feast day festival, Camargue, France

Martha Holmes / Riders and packhorse in grassy meadow. Hangay Mountains, Mongolia

Martha Holmes / Riders and packhorse in grassy meadow. Hangay Mountains, Mongolia

Jose B. Ruiz / Horse riders on beach at Conil de la Frontera, Cadiz province, southern Spain

Angelo Giampiccolo / Horse riders at La Caldara (a sulphurous hot water valley), Manziana, Lazio, Italy.

Angelo Giampiccolo / Horse riders at La Caldara (a sulphurous hot water valley), Manziana, Lazio, Italy.

Angelo Giampiccolo / Horse riders at La Caldara (a sulphurous hot water valley), Manziana, Lazio, Italy.

Jan Vermeer / Horseback riders in forest, Kootwijk region, Netherlands