Klein & Hubert / Wild mustangs, bay foal lying in wild flowers, Rocky Mountains, USA. June.

Klein & Hubert / Dun foal jumping over a palomino yearling while playing. Nevada, USA.

Klein & Hubert / Provence donkey foal, age three weeks, standing in a flowering grass meadow in spring, France

Carol Walker / Wild pinto Mustang mare and foal running in Sand Wash Basin, Colorado, USA.

Klein & Hubert / Cotentin domestic donkey (Equus africanus asinus) jenny nuzzling newborn foal, France.

Wim van den Heever / Plains zebra (Equus quagga) group of four including foal at sunset, Savuti Marsh, Botswana.

Niall Benvie / Icelandic horse foal near Stokkness, Iceland, September.

Klein & Hubert / Domestic donkey foal (age two months) in meadow with Apple blossom in the background, France.

Klein & Hubert / Domestic Provence donkey jenny and foal, France.

Klein & Hubert / Miniature domestic donkey foal running in field with buttercups, France.

Klein & Hubert / Two semi-wild Criollo foals, a gray sabino colt and a sorrel / chestnut filly, Tierra del Fuego.

Ashish & Shanthi Chandola / Plains zebra (Equus quagga) grooming foal, Kruger National Park, South Africa, July.

Roland Seitre / Przewalski horses (Equus ferus przewalskii) mother and foal, reintroduced in Takhin Tal by the International Takhi Group, Gobi Desert, Mongolia.

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

Klein & Hubert / Cotentin donkey foal running, France.

Klein & Hubert / Cotentin donkey foal playing with his mother, France.

Klein & Hubert / Sardinian donkey foal at sunset, France.

Klein & Hubert / Sardinian donkey mare and foal, France.

Klein & Hubert / Purebred Arabian horse, grey mare and her 3-weeks bay foal cantering through field, France.

Klein & Hubert / Purebred Arabian horse 3-week bay foal walking in meadow, France.

Klein & Hubert / Purebred Arabian horse, grey mare and her 3-week bay foal galloping in meadow. France.

Klein & Hubert / Sardinian donkey foal and Iris flowers, France.

Klein & Hubert / Sardinian donkey mare and foal, France.

Klein & Hubert / Sardinian donkey foal grazing, France.

Kristel Richard / Wild Mongolian mare and her foal trotting, plains at the foot of Dungurukh Uul mountain, near the border with China and Kazakhstan, Bayan-Olgiy aymag, Mongolia. September.

Kristel Richard / Portrait of a rare five-day old Posavina filly hidden by her mother's tail, Lonja, Croatia, August.

Michel Poinsignon,Michel Poinsignon / Merens horse (Equus caballus) mare with resting foal, Pyrenees mountains, France, August.

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

Carol Walker / Wild horse / Mustang, foal, portrait, Pryor mountains, Montana, USA

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

Bernard Castelein / Khur / Asiatic wild ass (Equus hemionus) with foal, walking at sunset, Little Rann of Kutch, Gujarat, India

Bernard Castelein / Khur / Asiatic wild ass (Equus hemionus) with foal, Little Rann of Kutch, Gujarat, India

Carol Walker / Mustang / wild horse, cremello colt foal Cremesso interacting with yearling filly, McCullough Peak herd, Wyoming, USA, August 2007

Carol Walker / Mustang / wild horse, yearling cremello colt Claro in thick winter coat, stretching, McCullough Peak herd, Wyoming, USA, February 2008

Carol Walker / Mustang / wild horses, cremello colt foal Cremesso with grazing mare, McCullough Peak herd, Wyoming, USA, June 2007

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

Edwin Giesbers / Grevy zebra (Equus grevyi) partial head portrait over back of foal, captive

Mary McDonald / Impala (Aepyceros melampus) mother grooming her newborn foal in rain. Lake Nakuru National Park, Kenya, East Africa.

Kristel Richard / A purebred Lusitano colt (with his mane and tail cut to mark his first year) trotting in the arena at the Companhia das Lez?as Stud Farm, Samora Correia, Santar? Portugal, July 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

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) 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

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

Kristel Richard / Konik horses (Equus caballus) - Two wild Konik young colts running one after the other, Millingerwaard nature reserve, Netherlands, April

Carol Walker / Mustang / Wild horses, mare with foal Mica, Adobe Town herd, Wyoming, USA, October 2010, grey foal went on to be adopted by photographer