Anup Shah / Indian wild ass racing across landscape {Equus hemionus khur} Little Rann of Kutch

Kristel Richard / An equine trainer, in the traditional white Gujarati clothes, walks a Kathiawari horse mare on her hindlegs without strain, Porbandar, Gujarat, India, December 2012. No release available.

Kristel Richard / A two-year old Kathiawari horse filly free jumping,Porbandar, Gujarat, India. Sequence 2 out out of 8.

Ben Lascelles / Tibetan wild ass / kiang / khyang / gorkhar (Equus kiang) grazing near Lake Rakshastal (the 'lake of the demon') Tibet

Mark MacEwen / Grevy's zebra (Equus grevyi) close-up of coat, Ol Pejeta Conservancy, Kenya, Africa.

Neil Aldridge / Common Zebra (Equus quagga) head detail portrait, Kruger National Park, South Africa

Kristel Richard / Lady riding a black Menorquin stallion, performing the bot or walking courbette of the Doma Menorquina, during the festival Mare de Deu de Gracia, in Mahon, Menorca, Spain 2012. Tourists are trying t...

Kristel Richard / Portrait of a grey Andalusian stallion, in Ciutadella, Menorca, Spain.

Kristel Richard / Wild Chincoteague (Equus caballus) two breeding stallions greeting one another, Chincoteague National Wildlife Refuge, Chincoteague Island, Virginia, USA, June

Anup Shah / Common or Plains zebra (Equus quagga burchellii) Masai Mara National Reserve, Kenya, September

Anup Shah / Common or Plains zebra (Equus quagga burchellii) lying dead on the savanna grassland, Masai Mara National Reserve, Kenya, March

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...

Peter Cairns / 2020VISION / Exmoor Ponies (Equus caballus) grazing at Seven Sisters Country Park, South Downs, England, November. Did you know? Some people believe that Exmoor ponies are related to the now extinct Tarpan horse o...

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

Carol Walker / Andulasian bay stallion running in snow storm, Longmont, Colorado, USA

Carol Walker / Herd of horses on ranch, Jackson Hole, Wyoming, USA

Carol Walker / Horses on ranch, two greys with mountains in background, Jackson Hole, Wyoming, USA

Carol Walker / Friesian horse, black stallion running in field, Livingston, Montana, USA

Carol Walker / Lusitano horse, bull fighter mounted on grey stallion, in this type of bull fighting neither horse nor bull are injured, Portugal, May 2011, model released

Carol Walker / Lusitano horse, grey stallion trotting, Portugal

Carol Walker / Lusitano horse, grey stallion trotting, Portugal

Carol Walker / Lusitano horse, dun stallion pawing the ground, Portugal, May 2011

Carol Walker / Lusitano horse, man training stallion in dressage steps, the high leap, Royal Riding School, Lisbon, Portugal, May 2011, model released

Carol Walker / Lusitano horse, man training stallion in dressage steps, standing up on hind legs and then jumping in the air, Royal Riding School, Lisbon, Portugal, May 2011, model released

Carol Walker / Lusitano horse, man training stallion in dressage steps, the high leap, Royal Riding School, Lisbon, Portugal, May 2011. No release available.

Carol Walker / Cowboy galloping through snow, wearing thick sheepskin coat, Wyoming, USA, February 2012, model released

Carol Walker / White horse of the Camargue, foal with its brown baby coat, Camargue, Southern France

Carol Walker / Two white horses of the Camargue, interacting, greeting head to head in marshes, Camargue, Southern France

Carol Walker / White horses of the Camargue with guardian, Camargue, Southern France. No release available.

Carol Walker / Two white horses of the Camargue, running through the sea, Camargue, Southern France

Carol Walker / White horses of the Camargue, herd running through water, Camargue, Southern France

Carol Walker / Two white horses of the Camargue, head to head at water, Camargue, Southern France

Carol Walker / Black Friesian stallion, head neck portrait, Ojai, California, USA

Carol Walker / Arabian stallion, chestnut, portrait, Ojai, California, USA

Carol Walker / Andalusian stallion running out of the sea on beach, Ojai, California, USA

Carol Walker / Wild horses / Mustangs, two stallions play fighting, Pryor Mountains, Montana, USA, July 2010

Sharon Heald / Common zebra (Equus quagga) foal in dusty sunset, Etosha National Park, Namibia Photo by Sharon Heald

Konrad Wothe / Camargue horses (Equus caballus) running in water at beach, Camargue, France, April

Kristel Richard / A traditionally dressed cowboy riding a Quarter mare, during the rodeo of the Festival de la Doma y el Folclore, Estancia Tacuaty, Misiones, Paraguay, January 2012. No release available.

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

Kristel Richard / A band of semi-feral Quarter mares and foals running across a creek, Estancia Don Amerigo, Chaco, Paraguay, January 2012

Kristel Richard / A rare East Bulgarian stallion cantering at the Kabiuk National Stud, Shumen, Bulgaria, February 2012

Carol Walker / Horse in snow storm with shed in background, USA

Andy Rouse / Burchell's Zebra (Equus quagga) mother with newborn foal. Masai Mara, Kenya.

Andy Rouse / Burchell's Zebra (Equus quagga) foal hiding under its mother's tail. Masai Mara, Kenya.

Andy Rouse / Two Common Zebra (Equus quagga) fighting. Masai Mara, Kenya.

Andy Rouse / Burchell's Zebra (Equus quagga) mother with new born foal. Masai Mara, Kenya.

Andy Rouse / Groups of Burchell's Zebra (Equus quagga) in grassland seen from balloon. Masai Mara, Kenya, Africa. (non-ex).