Francisco Marquez / Volunteers rounding up Greater flamingo (Phoenicopterus ruber) juveniles for ringing, Fuente de Piedra lagoon, Malaga, Spain. August.

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

Shattil & Rozinski / Cowboy rounding up horses at dawn, Colorado, USA. Model released

Pete Oxford / Chagra cowboys herding cattle and burning the hillsides to keep cattle on the move and rejuvenate the pasture at a hacienda during the annual overnight cattle round-up, Andes Mountains, Ecuador

Pete Oxford / Two Chagra cowboys on an overnight ride at a hacienda to herd cattle, Andes Mountains, Ecuador

Francisco Marquez / Volunteers rounding up Greater flamingo (Phoenicopterus ruber) juveniles for ringing, Fuente de Piedra lagoon, Malaga, Spain. August.

Francisco Marquez / Horse riders relaxing after rounding up mares and foals. Donana National Park, Spain. September 2014.

Francisco Marquez / Carts carrying food, drink and beds to the fields where the horsemen work, rounding up mares and foals. Donana National Park, Spain. June 2014.

Francisco Marquez / Horse riders relaxing after rounding up mares and foals. Donana National Park, Spain. September 2014.

Francisco Marquez / Horse riders relaxing after rounding up mares and foals. Donana National Park, Spain. September 2014.

Loic Poidevin / Gardian on Camargue horse rounding up bulls, Camargue, France, May 2017.

Peter Bassett / Male Southern elephant seal (Mirounga leonina) moving on a beach, rounding up a pup, Gold Harbour, South Georgia.

Pete Oxford / Domestic Cattle (Bos taurus) herd being rounded up, Saddle Mountain, Rurununi, Guyana

Pete Oxford / Domestic Cattle (Bos taurus) herd being rounded up, Saddle Mountain, Rurununi, Guyana

Kristel Richard / Cowboy mounted on a Pantaneiro stallion, rounding up a band of wild Pantaneiro horses, Pantanal, Mato Grosso do Sul, Brazil. August 2015.

Kristel Richard / Cowboy mounted on a Pantaneiro stallion, rounding up a band of wild Pantaneiro horse in water, Pantanal, Mato Grosso do Sul, Brazil.

Ben Lascelles / Goat herder rounding up goats for milking, these nomadic herders are known as Drokpa and make up about 25 percent of Tibetans in Tibet. Near Baryang, Tibet. June 2010

Ben Lascelles / Women goat herders rounding up goats for milking. Nomadic herders are known as Drokpa and make up about 25 percent of Tibetans in Tibet. Near Baryang, Tibet. June 2010

Carol Walker / Cowboy rounding up grey quarter horse, running through snow, Wyoming, USA, February 2012

Carol Walker / Cowboy rounding up and lassooing paint quarter horses in snow, Wyoming, USA, February 2012, model released

Carol Walker / Cowboy rounding up herd of paint quarter horses trotting through snow, Wyoming, USA, February 2012

Carol Walker / Cowboy rounding up herd of quarter horses in snow, Wyoming, USA, February 2012, model released

Carol Walker / Mustangs / Wild Horses being herded by helicopter of the Bureau of Land Managment, Adobe Town, Wyoming, USA, October 2010

Carol Walker / Mustangs / Wild Horses being herded by helicopter of the Bureau of Land Managment, Adobe Town, Wyoming, USA, October 2010

Carol Walker / Guardians rounding up the white horses of the Camargue, herd running through reeds and marsh, Camargue, Southern France, April 2011

Carol Walker / Wild horses / Mustangs, group herded into corral by helicopter, Great Divide Basin, Wyoming, USA, October 2011

Carol Walker / Wild horses / Mustangs, group herded into corral by helicopter, Great Divide Basin, Wyoming, USA, October 2011

Carol Walker / Wild horses / Mustangs, group herded into corral by helicopter, Great Divide Basin, Wyoming, USA, October 2011

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

Konrad Wothe / Cowboy rounding up horses, Oregon, USA, August 2005, model released

Bryan and Cherry Alexander / Chukchi man rounding up herd of Reindeer / caribou (Rangifer tarandus) near their winter pastures on the Chukotskiy Peninsula. Chukotka, Siberia, Russia, spring 2010

Bryan and Cherry Alexander / Chukchi man rounding up herd of Reindeer / caribou (Rangifer tarandus) near their winter pastures on the Chukotskiy Peninsula. Chukotka, Siberia, Russia, spring 2010

Bryan and Cherry Alexander / Saami herder rounding up stray Reindeer (Rangifer tarandus) at their winter pastures near Kautokeino. Finnmark, North Norway, March 2007.

Carol Walker / Cowboys rounding up herd of horses, Sombrero Ranch, Colorado, USA, May 2010, model released

Carol Walker / Cowboys rounding up wild horses, Sombrero Ranch, Colorado, USA, May 2010

Carol Walker / Cowboys rounding up herd of horses, Sombrero Ranch, Colorado, USA, May 2010, model released

Bryan and Cherry Alexander / Komy herder rounding up draught Reindeer / Caribou (Rangifer tarandus) on snowmobile. Yamal, Western Siberia, Russia, 2003.

Bryan and Cherry Alexander / Komy herder rounding up draught Reindeer / Caribou (Rangifer tarandus) on snowmobile. Yamal, Western Siberia, Russia, 2003.

Konrad Wothe / Domestic Horse (Equus caballus) group wrangled by cowboys, Oregon

Carol Walker / Helicopter used to round up Wild Horses / Mustangs in Sand Wash Herd Area, near Maybell, Colorado, USA

Carol Walker / Helicopter used to round up Wild Horses / Mustangs in Sand Wash Herd Area, near Maybell, Colorado, USA

Pete Oxford / Domestic Sheep (Ovis aries) group herded by sheep dog, Falkland Islands

Pete Oxford / Domestic Sheep (Ovis aries) flock round up by sheep dogs, Falkland Islands

Pete Oxford / Domestic Sheep (Ovis aries) round up by sheep dog, Falkland Islands

Pete Oxford / Domestic Sheep (Ovis aries) flock round up by sheep dogs, Falkland Islands

Shattil & Rozinski / Cowboy rounding up horses at dawn, Colorado, USA. Model released

Shattil & Rozinski / Cowboys rounding up horses, Colorado, USA. Model released

Shattil & Rozinski / Cowboys rounding up horses at dawn, Colorado, USA. Model released

Shattil & Rozinski / Cowboy rounding up horses at sunset, Colorado, USA. Model released

Inaki Relanzon / Sheepdog rounding up Domestic sheep {Ovis aries} Bergueda, Spain, August 2004

Jouan Rius / Rounding up Sheep (Ovis aries) for shearing, Shetland Islands, Scotland, UK

Carol Walker / Three cowboys rounding up five horses, Flitner Ranch, Shell, Wyoming, USA, model released

Carol Walker / Three cowboys and a cowdog herding five horses, Flitner Ranch, Shell, Wyoming, USA, model released

Carol Walker / Two cowboys stand with horses, another cowboy on hill, Flitner Ranch, Shell, Wyoming, USA, model released

George Chan / Mongolian nomad rounding up his horses in Inner Mongolia. June 2006

George Chan / Mongolian nomad rounding up his horses in Inner Mongolia. June 2006,

George Chan / Mongolian nomad rounding up his horses in Inner Mongolia. June 2006

Konrad Wothe / Cowboys herding a Domestic Horse (Equus caballus) group through Sagebrush, Oregon

Konrad Wothe / Domestic Horse (Equus caballus) group herded by cowboy and cowgirl, Oregon

Konrad Wothe / Domestic Horse (Equus caballus) group herded by cowboy, Oregon

Shattil & Rozinski / Cowboy rounding up Wild horses / Mustangs {Equus caballus} in snow, Colorado, USA

Shattil & Rozinski / Cowboy rounding up Wild horses / Mustangs {Equus caballus} Colorado, USA

Luiz Claudio Marigo / Cowboy rounding up cattle, Caatinga region, NE Brazil

Pete Oxford / Domestic Cattle (Bos taurus) being herded by Chagra cowboys at a hacienda during the annual overnight cattle round-up, Andes Mountains, Ecuador

Staffan Widstrand / Vaqueiro / Cowboy on horseback trying to lasso cattle. Pantanal, Brazil.

Pete Oxford / Domestic Cattle (Bos taurus) being herded by Chagra cowboys at a hacienda during the annual overnight cattle round-up, Andes Mountains, Ecuador

Pete Oxford / Domestic Cattle (Bos taurus) roped by Chagra cowboys at a hacienda during the annual overnight cattle round-up, Andes Mountains, Ecuador

Pete Oxford / Domestic Cattle (Bos taurus) being herded by Chagra cowboys at a hacienda during the annual overnight cattle round-up, Andes Mountains, Ecuador

Pete Oxford / Domestic Cattle (Bos taurus) being herded by Chagra cowboys at a hacienda during the annual overnight cattle round-up, Andes Mountains, Ecuador

Pete Oxford / Domestic Cattle (Bos taurus) being herded by Chagra cowboys at a hacienda during the annual overnight cattle round-up, Andes Mountains, Ecuador

Pete Oxford / Domestic Cattle (Bos taurus) calf roped by Chagra cowboys at a hacienda during the annual overnight cattle round-up, Andes Mountains, Ecuador

Pete Oxford / Domestic Cattle (Bos taurus) being herded by Chagra cowboys at a hacienda during the annual overnight cattle round-up, Andes Mountains, Ecuador

Pete Oxford / Domestic Cattle (Bos taurus) being herded by Chagra cowboys at a hacienda during the annual overnight cattle round-up, Andes Mountains, Ecuador

Pete Oxford / Domestic Cattle (Bos taurus) being herded by Chagra cowboys at a hacienda during the annual overnight cattle round-up, Andes Mountains, Ecuador

Pete Oxford / Domestic Cattle (Bos taurus) being herded by Chagra cowboys at a hacienda during the annual overnight cattle round-up, Andes Mountains, Ecuador

Pete Oxford / Chagra cowboy with a bull he has roped on an overnight ride at a hacienda during the annual cattle round-up, Andes Mountains, Ecuador

Pete Oxford / Chagra cowboys, herding cattle during annual round-up, Yanahurco Hacienda, Andes, Ecuador

Yva Momatiuk & John Eastcott / Mustang (Equus caballus) group running, Bureau of Land Management wranglers round up surplus horses for adoption, Wyoming

Yva Momatiuk & John Eastcott / Mustang (Equus caballus) chased by Bureau of Land Management wranglers who round up surplus horses for adoption, Wyoming

Yva Momatiuk & John Eastcott / Mustang (Equus caballus) chased by Bureau of Land Management wranglers who round up surplus horses for adoption, Wyoming

Pete Oxford / Domestic Cattle (Bos taurus) being herded by Chagra cowboys at a hacienda during the annual overnight cattle round-up, Andes Mountains, Ecuador

Pete Oxford / Chagra cowboy roping a bull at a hacienda during the annual round-up, Andes Mountains, Ecuador

Pete Oxford / Chagra cowboy sorting cattle at a hacienda during the annual round-up, one chagra is charged by a bull while his friends watch, Andes Mountains, Ecuador

Ross Couper-Johnston / Guachos rounding up cattle, Ibera marshes NR, Argentina

Ingo Arndt / Domestic Sheep (Ovis aries) flock being rounded up by cowboy, Patagonia, Chile

Colin Monteath / Caribou (Rangifer tarandus) herd gathering in valley after spending winter in Hunkher Mountains during spring round up, Mongolia

Colin Monteath / Caribou (Rangifer tarandus) herd gathering in valley after spending winter in Hunkher Mountains during spring round up, Mongolia

Colin Monteath / Caribou (Rangifer tarandus) herd being moved down valley by Tsataan herder after spending winter in Hunkher Mountains during spring round up, Mongolia

Colin Monteath / Caribou (Rangifer tarandus) herd being moved down valley by Tsataan herder after spending winter in Hunkher Mountains during spring round up, Mongolia

Mike Read / Commoners rounding up New Forest ponies during the annual round-up / drift, beside Amberwood Inclosure, New Forest National Park, Hampshire, UK, October 2010

Mike Read / New Forest ponies, commoner rounding up mare and foal during the annual round-up / drift, near Brockenhurst, New Forest National Park, Hampshire, England, September 2004

Donald M. Jones / American Bison (Bison bison) in paddock at annual roundup, National Bison Range, Montana

Pete Oxford / Domestic Cattle (Bos taurus) group round up to be used for pulling the ox carts during the floods, Brazil

Pete Oxford / Domestic Cattle (Bos taurus) group round up by cowboy to be used for pulling the ox carts during the floods, Brazil

Pete Oxford / Domestic Cattle (Bos taurus) being herded by Chagra cowboys at a hacienda during the annual overnight cattle round-up, Andes Mountains, Ecuador

Pete Oxford / Ocelot (Leopardus pardalis) fur and goat hair on chaps worn by Chagra cowboys at a hacienda during the annual overnight cattle round-up, Andes Mountains, Ecuador