Andy Rouse / Mountain gorilla (Gorilla beringei) silverback in Susa group, Parc National des Volcans, Rwanda

Suzi Eszterhas / Mountain Gorilla (Gorilla gorilla beringei) silverback feeding, Parc National des Volcans, Rwanda

Suzi Eszterhas / Mountain Gorilla (Gorilla gorilla beringei) mother holding five month old twin babies, Parc National des Volcans, Rwanda

Suzi Eszterhas / Mountain Gorilla (Gorilla gorilla beringei) mother holding five month old twin babies, Parc National des Volcans, Rwanda

Paul D Stewart / Engraving of an ape-like cave man accompanying an article by Boitard in the French 'Magasin Universel' (April 1838). This is the earliest reconstruction of a pre-historic human. It is striking that it...

Pete Oxford / Man with performing pet Barbary ape (Macaca sulvanus) Morocco, June 2009

Andy Rouse / Mountain gorilla (Gorilla beringei) silverback beating chest and charging, Susa group, Parc National des Volcans, Rwanda Not available for ringtone/wallpaper use.

Andy Rouse / Mountain gorilla (Gorilla beringei) silverback, Susa group, Parc National des Volcans, Rwanda

Andy Rouse / Mountain gorilla (Gorilla beringei) silverback charging forward, Susa group, Parc National des Volcans, Rwanda

Andy Rouse / Mountain gorilla (Gorilla beringei) silverback beating chest and charging forward, Susa group, Parc National des Volcans, Rwanda, HIGHLY COMMENDED, MAMMAL BEHAVIOUR, 2011 WILDLIFE PHOTOGRAPHER OF THE...

Andy Rouse / Mountain gorilla (Gorilla beringei) silverback beating chest and charging, Susa group, Parc National des Volcans, Rwanda

Andy Rouse / Mountain gorilla (Gorilla beringei) youngster with bad teeth in Susa group, Parc National des Volcans, Rwanda

Andy Rouse / Mountain gorilla (Gorilla beringei) baby in mother's arms, Susa group, Parc National des Volcans, Rwanda

Thomas Marent / Bornean White-bearded Gibbon (Hylobates albibarbis) walking on liana, Tanjung Puting National Park, Borneo, Indonesia

Thomas Marent / Bornean White-bearded Gibbon (Hylobates albibarbis), Tanjung Puting National Park, Borneo, Indonesia

Suzi Eszterhas / Sumatran Orangutan (Pongo abelii) two and a half year old baby calling, Gunung Leuser National Park, north Sumatra, Indonesia

Suzi Eszterhas / Sumatran Orangutan (Pongo abelii) mother and playful one and a half year old baby, Gunung Leuser National Park, north Sumatra, Indonesia

Suzi Eszterhas / Sumatran Orangutan (Pongo abelii) nine month old baby playing in tree, Gunung Leuser National Park, north Sumatra, Indonesia

Angelo Gandolfi / Barbary Ape (Macaca sylvanus) weaned baby (about six months old) trying to suckle. Male at right. Ifrane Nature Reserve, Middle Atlas Mountains, Morocco.

Angelo Gandolfi / Tourists walking past Barbary ape (Macaca sylvanus). Ifrane Nature Reserve, Middle Atlas Mountains, Morocco. March 2007.

Theo Allofs / Celebes Black Macaque (Macaca nigra) pair delousing, Sulawesi, Indonesia

Theo Allofs / Celebes Black Macaque (Macaca nigra) dominant male, Sulawesi, Indonesia

ZSSD / Bonobo (Pan paniscus) female playing with youngster by throwing him up in the air, native to Africa

ZSSD / Western Lowland Gorilla (Gorilla gorilla gorilla) scratching its head, native to Africa

Thomas Marent / Agile Gibbon (Hylobates agilis) pair, Camp Leaky, Tanjung Puting National Park, Indonesia

Thomas Marent / Orangutan (Pongo pygmaeus) female with baby on back, Camp Leaky, Tanjung Puting National Park, Indonesia

Bruno D'Amicis / Young Barbary Macaque (Macaca sylvanus) playing among Cedar (Cedrus atlantica) trees, backlit, Endangered species. Atlas mountains, Morocco, NW Africa

Bruno D'Amicis / Young Barbary Macaques (Macaca sylvanus) playing among Cedar (Cedrus atlantica) trees, backlit, Endangered species. Atlas mountains, Morocco, NW Africa

Thomas Marent / Mountain Gorilla (Gorilla gorilla beringei) silverback, Volcanoes National Park, Rwanda

ZSSD / Western Lowland Gorilla (Gorilla gorilla gorilla) baby clinging to mother's back, critically endangered, native to Africa

Ingo Arndt / Chimpanzee (Pan troglodytes) juvenile fishing for termites, endangered, Gombe Stream National Park, Tanzania

Ingo Arndt / Mountain Gorilla (Gorilla gorilla beringei) juvenile, Parc National Des Volcans, Rwanda

Ingo Arndt / Mountain Gorilla (Gorilla gorilla beringei) baby, Parc National Des Volcans, Rwanda

Ingo Arndt / Mountain Gorilla (Gorilla gorilla beringei) Susa group showing male silverback, two females and two juveniles, Parc National Des Volcans, Rwanda

Suzi Eszterhas / Mountain Gorilla (Gorilla gorilla beringei) 10 month old infant playfully climbing bamboo pole, endangered, Parc National Des Volcans, Rwanda

Suzi Eszterhas / Mountain Gorilla (Gorilla gorilla beringei) 10 month old infant riding on mother's back, endangered, Parc National Des Volcans, Rwanda

Solvin Zankl / Celebes / Black / Sulawesi crested macaque (black ape) {Macaca nigra} in rainforest. Sulawesi, Indonesia

Anup Shah / Orang utan baby, (Pongo abelii) Gunung Leuser NP, Indonesia

Anup Shah / Orang utan in forest, (Pongo abelii) Gunung Leuser NP, Indonesia

Anup Shah / Orang utan with baby, (Pongo abelii) Gunung Leuser NP, Indonesia

Anup Shah / Orang utan silhouetted in trees, (Pongo abelii) Gunung Leuser NP, Indonesia

Anup Shah / Orang utan playing with water in stream, (Pongo abelii) Gunung Leuser NP Indonesia

TJ Rich / Head portrait of male silverback Western lowland gorilla {Gorilla gorilla gorilla} UK

ZSSD / Western Lowland Gorilla (Gorilla gorilla gorilla) mother walking away with 48 day old baby on back, native to Africa

ZSSD / Western Lowland Gorilla (Gorilla gorilla gorilla) male vocalizing, native to equatorial West Africa

ZSSD / Western Lowland Gorilla (Gorilla gorilla gorilla) male portrait, native to Africa

Konrad Wothe / Mountain Gorilla (Gorilla gorilla beringei) males fighting, Virunga National Park, Democratic Republic of the Congo

Konrad Wothe / Mountain Gorilla (Gorilla gorilla beringei) baby rolling on forest floor, Virunga National Park, Congo

Gerry Ellis / Chimpanzee (Pan troglodytes) portrait, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) swinging in, tree, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) pair grooming, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) pair interacting, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) mom and baby, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) group grooming, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) mom, baby, Gombe Stream National Park, Tanzania

Gerry Ellis / Mountain Gorilla (Gorilla gorilla beringei) female showing finger lost to poacher's trap, Virunga Mountains, Democratic Republic of the Congo

Gerry Ellis / Chimpanzee (Pan troglodytes) baby, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) portrait, adult named Frodo, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) uses fishing tool to catch insects, Washington Park Zoo, Washington

Gerry Ellis / Chimpanzee (Pan troglodytes) teaching, young male to use fishing tool, Washington Park Zoo

Konrad Wothe / Orangutan (Pongo pygmaeus) orphans embracing, Borneo, Malaysia

Gerry Ellis / Chimpanzee (Pan troglodytes) uses fishing tool, Washington Park Zoo

Gerry Ellis / Western Lowland Gorilla (Gorilla gorilla gorilla) male portrait, endangered, native to Africa

Gerry Ellis / Mountain Gorilla (Gorilla gorilla beringei) family resting in rainforest, Virunga, Rwanda

Gerry Ellis / Mountain Gorilla (Gorilla gorilla beringei) male, Virunga Mountains nestled along the northern border of Rwanda, the Democratic Republic of the Congo and Uganda

Gerry Ellis / Orangutan (Pongo pygmaeus) hanging on tree, Sepilok Forest Reserve, Sabah, Borneo

Gerry Ellis / Orangutan (Pongo pygmaeus) mother and baby, Borneo

Gerry Ellis / Chimpanzee (Pan troglodytes) uses fishing tool to feed on insects, Washington Park Zoo

Konrad Wothe / Orangutan (Pongo pygmaeus) infant hanging from branch, Borneo

Konrad Wothe / Orangutan (Pongo pygmaeus) bathing in river while hanging upside-down from vine, Gunung Leuser National Park, Sumatra, Indonesia

Konrad Wothe / Bonobo (Pan paniscus) mother and baby interacting, native to Africa

Konrad Wothe / Western Lowland Gorilla (Gorilla gorilla gorilla) silverback, Africa

Gerry Ellis / Western Lowland Gorilla (Gorilla gorilla gorilla) silverback male portrait, Africa

Gerry Ellis / Chimpanzee (Pan troglodytes) group, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) teaching young male to use fishing tool, Washington Park Zoo

Gerry Ellis / Western Lowland Gorilla (Gorilla gorilla gorilla) silverback male, equatorial Africa

Gerry Ellis / Mountain Gorilla (Gorilla gorilla beringei) group eating, Virunga Mountains

Gerry Ellis / Orangutan (Pongo pygmaeus) pair playing in trees, Borneo

Konrad Wothe / Orangutan (Pongo pygmaeus) drinking from river while hanging upside-down from vine, Gunung Leuser National Park, Sumatra, Indonesia

Konrad Wothe / Western Lowland Gorilla (Gorilla gorilla gorilla) male carrying baby, central Africa

Konrad Wothe / Orangutan (Pongo pygmaeus) juvenile swinging in tree, Tanjung Puting National Park, Borneo

ZSSD / Chimpanzee (Pan troglodytes) calling while reclining, native to Africa

Anup Shah / White-handed gibbon with baby. Native to South East Asia

Anup Shah / White-handed gibbon with young. Species native to South East Asia

Anup Shah / White-handed gibbon with young. Native to South-East Asia

Anup Shah / White-handed gibbon baby. Endangered species native to South East Asia.

Jabruson / Mountain gorilla {Gorilla g beringei} juvenile, Democratic Rep of the Congo, Africa

Tom Vezo / Lowland gorilla adult male in zoo, USA

Anup Shah / Male Mountain gorilla head portrait {Gorilla beringei} Parc National des Volcans NP Rwanda 1997

Anup Shah / Male Mountain gorilla resting {Gorilla beringei} Parc National des Volcans NP Rwanda 1997

Anup Shah / Mountain gorilla eating roots {Gorilla beringei} Parc National des Volcans NP Rwanda 1997

Jose B. Ruiz / Barbary apes {Macaca sylvanus) with Straits of Gibraltar in background, Gibraltar, Spain

Jose B. Ruiz / Barbary apes playing on motorcycle {Macaca sylvanus} Gibraltar, Spain

TJ Rich / Male silverback Western lowland gorilla feeding {Gorilla gorilla gorilla} UK

TJ Rich / Head portrait of male silverback Western lowland gorilla {Gorilla gorilla gorilla} UK

TJ Rich / Male silverback Western lowland gorilla sitting portrait {Gorilla gorilla gorilla} UK