Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) dominant male silverback 'Makumba' aged 32 years feeding on fruit with his son 'Tembo' aged 4 years sitting in the background, Bai Hokou, Dzanga Sangh...

Andy Rouse / African Lion (Panthera leo) Notch from Disney African Cats film and two of his sons, Masai Mara GR, Kenya, January 2011

Anup Shah / Female Chimpanzee 'Fanni' 20-years-old, resting with sons Fundi, 17-months-old, and Fudge, 5-years-old {Pan troglodytes schweinfurtheii} Gombe NP, Tanzania. 2002

Anup Shah / Female Chimpanzee 'Gremlin' 31-years-old, carrying twin daughters Golden and Glitter, 3-years-3-monhts-old, jockey riding {Pan troglodytes schweinfurtheii} Gombe NP, Tanzania. 2002

Jeff Rotman / Father and sons observe Caribbean reef shark. {Carcharhinus perezi} Bahamas. Model released. Model released.

Anup Shah / Eastern chimpanzee (Pan troglodytes schweinfurtheii) female 'Gremlin' aged 43 years and her sons 'Gimli' aged 10 years and 'Gizmo' aged 4 years . Gombe National Park, Tanzania....

David Woodfall / Father and son walking in Loweswater, Lake District National Park, Cumbria, UK. November. Medium repro only.

Duncan Murrell / Batak village chief carrying his son past a large tree, Sitio Manggapin, Cleopatra's Needle Critical Habitat, Palawan, the Philippines.

Ingo Arndt / Migratory locusts (Locusta migratoria capito) roasted and eaten by a farmer and his sons. Near Isalo National Park, Madagascar. August 2013.

Paul D Stewart / Paradise parrot (Psephotus pulcherrimus) illustration from W. T. Greene Parrots In Captivity, George Bell and Sons, 1884 - 1887. Wood engraving by Benjamin Fawcett after drawings by A.F. Lydon. Extinc...

Paul D Stewart / Illustration of Carolina parrot (Conuropsis carolinensis) from W. T. Greene Parrots In Captivity, George Bell and Sons, 1884 - 1887. Wood engraving by Benjamin Fawcett after drawings by A.F. Lydon. Th...

Anup Shah / Eastern chimpanzee (Pan troglodytes schweinfurtheii) female 'Gremlin' aged 41 years and her daughter 'Gaia' aged 19 years termite fishing while their sons play. Gombe National Park, Tanzania. May 2012...

Eric Baccega / Nenet herder inside tent with daughter and sons, wearing coats made with reindeer skin and fur. Yar-Sale district. Yamal, Northwest Siberia, Russia. April 2016.

Eric Baccega / Nenet elder with grandson dressed in winter coats, made from reindeer skin in tent. Yar-Sale district, Yamal, Northwest Siberia, Russia. April 2016.

Eric Baccega / Nenet woman preparing for spring migration dressing herself and her son in traditional winter boots and coat made with reindeer skin. The temperature is below zero. Yar-Sale district, Yamal, Northwest...

Eric Baccega / Nenet herder on sled with young boy during spring migration wearing traditional coat made with reindeer skin. Yar-Sale district. Yamal, Northwest Siberia, Russia. April 2016.

Eric Baccega / Beekeeper with seven-year old twins using smoker to calm honeybees (Apis mellifera) in hive. Lorraine, France. May 2016.

Enrique Lopez-Tapia / Mursi woman with clay lip plate, holding rifle and son. Mago National Park. Omo Valley, Ethiopia.

Enrique Lopez-Tapia / Mursi woman with clay lip plate and children, armed with rifle. Mago National Park. Omo Valley, Ethiopia.

Pete Oxford / Konyak Naga child outside house with animal skulls, Mon district, Nagaland, North East India, October 2014.

Enrique Lopez-Tapia / Dassanech woman with headdress of nuts and bolts, her son with headdress of bottle tops. Dassanech tribe, Lower Omo Valley. Ethiopia, November 2014

Enrique Lopez-Tapia / Hamer woman with her son, in traditional clothes and ornaments. Territory of the hamer tribe. Lower Omo Valley. Ethiopia, November 2014

Enrique Lopez-Tapia / Mursi boy with gun, with mother who has a lip plate, Mursi tribe. Mago National Park. Ethiopia, November 2014

Juergen Freund / Emosi Time, turtle monitor and son holding freshly laid Hawksbill turtle (Eretmochelys imbricata) eggs, in order to relocate them. Kavewa Island, Macuata Province, Fiji, South Pacific. August 2013

Steve O. Taylor (GHF) / Bushman / San man with son, Sioma Nqwezi Park, Zambia. November 2010.

Kirkendall-Spring / Nate Harrison teaching his son Gabriel how to surf, Hobuck Beach, Makah Reservation, Washington, USA, August 2014. Model Released. Model released.

Steve O. Taylor (GHF) / Sultan of Mirriah sitting outside building with sons and courtiers. Niger, 2005.

Steve O. Taylor (GHF) / Batwa Pygmies, father and son foraging for food. Democratic Republic of the Congo, 2008-2009.

David Tipling / Roost of around 800 Pied Wagtails (Motacilla alba) in trees outside Terminal 5 Heathrow, London, UK. December 2013.

Enrique Lopez-Tapia / Himba mother shaving sons hair, Kaokoland, Namibia, September 2013.

Enrique Lopez-Tapia / Himba mother shaving sons hair, Kaokoland, Namibia, September 2013.

Enrique Lopez-Tapia / Himba mother shaving sons hair, Kaokoland, Namibia, September 2013.

Andy Rouse / African lion (Panthera leo) male lion, one of Notch's sons called Bob, Masai Mara National Reserve, Kenya

Andy Rouse / African lion (Panthera leo) male lion, one of Notch's sons called Bob, Masai Mara National Reserve, Kenya

Rick Tomlinson / Watch leader Magnus Olsson (SWE) with his two sons on "Ericsson 3", which finished third on leg one of the Volvo Ocean Race into Cape Town, November 2008. 10th Volvo Ocean Race, 2008-09. For EDITORIAL...

Andy Rouse / African lion (Panthera leo) male walking along path, one of Notch's sons named Bob, Masai Mara GR, Kenya, February

Nick Upton / Brixham beam trawler "Three Sons" passing Stepper Point as it enters the mouth of the Camel Estuary, near Padstow, Cornwall, UK, April 2010.

Mark Raycroft / White-tailed Deer (Odocoileus virginianus) doe in field watched by father and two sons

Juergen Freund / Bajau fisherman with his two sons on a fishing trip, Pulau Gaya, Borneo, Malaysia

Kristel Richard / Man with son in traditional costume, parading on Lusitano horse, at the Feira da Golega, Ribatejo, Portugal.

David Maitland / Tapeworm (Taenia pisiformis) of European brown hare (Lepus europaeus) showing 'circular-saw-like' structure on the head, or scolex, which will anchor into the hare's small intestine. Mi...