Tony Heald / Asian elephant (Elephas maximus) domesticated elephant working, picking reeds, Kaziranga National Park, Assam, India, March 2009.

Kristel Richard / Eagle hunter mounted on Mongolian horse with his female Golden eagle (Aquila chrysaetos) at Eagle Hunters Festival, near Sagsai, Bayan-Ulgii Aymag, Mongolia. September 2014..

Enrique Lopez-Tapia / Domestic Asian elephants (Elephas maximas) used for riding safaris with their keepers, Royal Chitwan National Park, Nepal.

Jabruson / African elephant (Loxodonta africana) two youngsters 'Mecca' and 'Lungunia' being fed mangos by their keeper, Garamba National Park, North Eastern Zaire, now the Democratic Republic of Congo. Remnants...

Kristel Richard / Eagle hunter mounted on Mongolian horse with his female Golden eagle (Aquila chrysaetos) at Eagle Hunters Festival, near Sagsai, Bayan-Ulgii Aymag, Mongolia. September 2014..

Jeff Rotman / Dolphin trainer and child interacting with juvenile Bottlenose dolphin (Tursiops truncatus) Dolphin reef, Eilat, Israel, Red Sea. Model released.

John Waters / Professional bird handler and trainer Rose Buck holding adult female Goshawk (Accipiter gentilis) Somerset, UK, February 2014. Captive, occurs throughout much of the Northern Hemisphere.

John Waters / Rose and Lloyd Buck, professional bird handlers and trainers, holding adult female Goshawk (Accipiter gentilis) Somerset, UK, January 2013. Captive, occurs throughout much of the Northern Hemisphere.

John Waters / Rose and Lloyd Buck, professional bird handlers and trainers, holding adult female Goshawk (Accipiter gentilis) Somerset, UK, January 2013. Captive, occurs throughout much of the Northern Hemisphere.

Kristel Richard / Marbach staff in traditional uniform drive a Black Forest stallion and a Norman Cob stallion during the stud's 500th anniversary celebrations. Marbach National Stud, Swabian Alps, near Reutlingen, in...

Kristel Richard / Marbach riders in traditional uniform perform during the stud's 500th anniversary celebrations, Marbach National Stud, Swabian Alps, near Reutlingen, in Baden-Wurttemberg, Germany. May 2014.

Roland Seitre / Tourists posing with chained Tiger (Panthera tigris) Thailand. Captive, occurs in Asia. Endangered species.

Philippe Clement / California sea lion (Zalophus californianus) jumping through hoop held by trainer during show, Cabarceno Natural Park, Penagos, Cantabria, Spain, May 2014. Captive, occurs in Canada, Mexico and the Un...

Philippe Clement / California sea lion (Zalophus californianus) performing trick, standing on one flipper, Cabarceno Natural Park,, Cantabria, Spain, May 2014.

Ernie Janes / Bottle-nosed dolphins (Tursiops truncatus) with their keeper, Roatan Institute for Marine Science, Bay Islands, Honduras.

Jabruson / Domesticated African elephants (Loxodonta africana) with Cornacs riding across Garamba National Park, Nagero, North Eastern Zaire, now Democratic Republic of Congo

Jabruson / Domesticated African elephants (Loxodonta africana) being cleaned by mahout Cornac in river, alongside children doing their washing, Nagero, Garamba National Park, North Eastern Zaire, now the Democra...

Jabruson / Domesticated African elephant (Loxodonta africana) being cleaned by mahout Cornac in river, Nagero, Garamba National Park, North Eastern Zaire, now the Democratic Republic of Congo. Remnants of the ol...

Solvin Zankl / Harbour porpoises (Phocoena Phocoena) working with trainers, Fjord and Baelt centre, Norway, Captive, May 2009

John Downer Productions / Fighting rams with trainers, Thailand

Patricio Robles Gil / Asian Elephant (Elephas maximus) working elephant dressed for ceremonies with three trainers, Cochin, southwestern Coast of India

Mitsuaki Iwago / Asian Elephant (Elephas maximus) pair with trainers on beach, Sri Lanka