Denis-Huot,Denis-Huot / Grant's zebra (Equus burchelli boehmi) herd with large cloud above, Amboseli National Park, Kenya

Philippe Clement / Domestic cows (Bos taurus) and free roaming horses grazing in the Pyrenees-Atlantiques, Pyrenees, France, June

Charlie Summers / American bison (Bison bison) herd roaming the plains, Custer State Park, South Dakota, USA, September

Angelo Gandolfi / A wild Grey Wolf (Canis lupus) roaming on the outskirts of a village at night, Tuscany "Maremma" Italy.

Shin Yoshino / African Elephant (Loxodonta africana) pair roaming grasslands in front of Mt Kilimanjaro, Tanzania

Sumio Harada / American Bison (Bison bison) free roaming wild herd along river, Yellowstone National Park, North America

Jabruson / Mountain gorilla asleep {Gorilla beringei} Virunga NP, Democratic Republic of Congo. "Rafiki" killed by roaming militia after Rwandan crisis.

Jabruson / Young Mountain gorilla {Gorilla beringei} peers into camera, Virunga NP, Dem Rep of Congo. Silverback "Rugabo" in background was killed by militia roaming the park during the Rwandan refugee crisis.

Neil Aldridge / Footprint of a free-roaming African Wild Dog (Lycaon pictus) in sand on farmland bordering Mapungubwe National Park, Limpopo Province, South Africa.

Andy Rouse / Wildebeest (Connochaetes taurinus) during migration, with setting sun, Masai Mara, Kenya, Africa. August.

Philippe Clement / Shepherd and tourists herding flock of sheep (Ovis aries) to pasture up in the mountains along the Col du Soulor, with free roaming horses, Hautes-Pyrenees, Pyrenees, France, June 2012

Diane McAllister / Portrait of a wild horse mare and her colt (Equus caballa) roaming on hills near Placitas. New Mexico, USA, February.

Gary K. Smith / Exmoor Ponies with foal, grazing in Exmoor National Park, Somerset, UK, May

Gary K. Smith / Highland Domestic Cattle (Bos taurus) roaming free, Mull, Inner hebrides, Scotland, UK

Pete Cairns / Domestic chicken / hen {Gallus gallus domesticus), Black Rock strain roaming free range on Scottish farm, Scotland, UK

Pete Cairns / Domestic chicken / hen {Gallus gallus domesticus), Black Rock strain roaming free range on Scottish farm, Scotland, UK

Pete Cairns / Domestic chicken / hen {Gallus gallus domesticus), Black Rock strain roaming free range on Scottish farm, Scotland, UK

Pete Cairns / Domestic chicken / hen {Gallus gallus domesticus), Black Rock strain roaming free range on Scottish farm, Scotland, UK

Pete Cairns / Domestic chicken / hen {Gallus gallus domesticus), Black Rock strain roaming free range on Scottish farm, Scotland, UK

Sumio Harada / American Bison (Bison bison) portrait in snow, member of a free roaming wild herd, Yellowstone National Park, North America

Sumio Harada / American Bison (Bison bison) free roaming wild herd grazing under dark sky, Yellowstone National Park, North America

Sumio Harada / American Bison (Bison bison) two males fighting, members of a free roaming wild herd, Yellowstone National Park, North America

Sumio Harada / American Bison (Bison bison) calf, member of a free roaming wild herd, Yellowstone National Park, North America

Sumio Harada / American Bison (Bison bison) free roaming wild herd along river, Yellowstone National Park, North America

Tui De Roy / Feral Cattle (Bos taurus) herd roaming grassy slope stripped of native vegetation, Cerro Azul, Isabella Island, Galapagos Islands, Ecuador

Tui De Roy / Maned Wolf (Chrysocyon brachyurus) stilt-like legs adapted for roaming long distances in tall grass habitat, Serra de Canastra National Park, Brazil

Tui De Roy / Maned Wolf (Chrysocyon brachyurus) stilt-like legs adapted for roaming long distances in tall grass habitat, Serra de Canastra National Park, Brazil

Tom Vezo / Polar bear {Ursus maritimus} roaming the tundra, Churchill, Manitoba, Canada

Rick Tomlinson / Reindeer (Rangifer tarandus) roaming coast of Spitsbergen, Svalbard area, Norway.

Rick Tomlinson / Reindeer (Rangifer tarandus) roaming coast of Spitsbergen, Svalbard, Norway.

Rick Tomlinson / Reindeer (Rangifer tarandus) roaming coast of Spitsbergen, Svalbard, Norway.

Rick Tomlinson / Reindeer (Rangifer tarandus) roaming coast of Spitsbergen, Svalbard, Norway.

Sumio Harada / American Bison (Bison bison) portrait in falling snow, member of a free roaming wild herd, Yellowstone National Park, North America

Kristel Richard / Free roaming Gypsy Vanner colt/horse (right) playfighting with another colt, on the flood plains, Port Meadow, Oxford, Oxfordshire, England.u

David Perpinan / Sharpei dog male roaming on streets of San Cristobal, Galapagos Islands, September. Import of dogs is illegal on island.

David Perpinan / Feral cat roaming on outskirts of San Cristobal, Galapagos Islands, September.

Matt Roseveare / A free roaming Donkey (Equus asinus) suckling its foal on a road in village, Brockenhurst, New Forest National Park, Hampshire, England, UK. September, 2023.

Kristel Richard / Shetland pony free roaming mare standing alert on the Seven Sisters cliffs, South Downs, East Sussex, England, UK. March, 2021.

Kristel Richard / Shetland pony, close up of free roaming mare, Seven Sisters cliffs, South Downs, East Sussex, England, UK. March, 2021.

Kristel Richard / Shetland pony, portrait of free roaming mare, Seven Sisters cliffs, South Downs, East Sussex, England, UK. March, 2021.

Kristel Richard / Gypsy vanner horse portrait of mare free roaming on the commons, Port Meadow, Oxfordshire, England, UK. February, 2021.

Kristel Richard / Gypsy vanner horse, portrait of mare free roaming on the commons, Port Meadow, Oxfordshire, England, UK. February, 2021.

Kristel Richard / Gypsy vanner horse, two free roaming mares standing alert on the commons, Port Meadow, Oxfordshire, England, UK. February, 2021.

Kristel Richard / Gypsy vanner horse, two free roaming mares trotting on the commons, Port Meadow, Oxfordshire, England, UK. February, 2021.

Nigel Cattlin / Exmoor pony roaming and grazing in Snelsmore Common near Newbury in autumn , maintained by Berks, Bucks and Oxon Wildlife Trust, Berkshire, November

Will Watson / Free-roaming Aldabra giant tortoise (Geochelone gigantea), feeding on cabbage leaf, introduced onto Prison Island, Zanzibar, Tanzania. January.