Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) female 'Mopambi' sitting with her playful infant 'Sopo' aged 18 months, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Republi...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) female 'Mopambi' sitting with her playful infant 'Sopo' aged 18 months, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Republi...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) juvenile male 'Mobangi' aged 5 years resting on a tree buttress with younger gorilla nearby, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Ce...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) sub-adult male 'Kunga' aged 13 years head and shoulders portrait, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Republic. Dec...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) juvenile female 'Bokata' aged 6 years feeding on sedge in Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Republic. November 20...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) dominant male silverback 'Makumba' aged 32 years feeding on sedge grasses in Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Re...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) dominant male silverback 'Makumba' aged 32 years feeding on sedge grasses in Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Re...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) sub-adult female 'Mosoko' aged 8 years and juvenile male 'Mobangi' aged 5 years drinking from a dirty pool of water in Bai Hokou, Dzanga Sangha Specia...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) sub-adult male 'Kunga' aged 13 years playing with juvenile male 'Tembo' aged 4 years in Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) sub-adult male 'Kunga' aged 13 years playing with juvenile male 'Tembo' aged 4 years in Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) juvenile male 'Mobangi' aged 5 years feeding on fruit while sitting on the forest floor, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Centra...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) dominant male silverback 'Makumba' aged 32 years head and shoulders portrait, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African R...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) dominant male silverback 'Makumba' aged 32 years sitting portrait, with other gorilla behind, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, C...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) sub-adult male 'Kunga' aged 13 years playing with juvenile male 'Tembo' aged 4 years in Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) infant 'Sopo' aged 18 months feeding on fruit, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Republic. December 2011.

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) female 'Mopambi' feeding on fruit, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Republic. December 2011.

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) infant 'Sopo' aged 18 months sitting portrait, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Republic. December 2011.

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) rear view of dominant male silverback 'Makumba' aged 32 years walking along a forest trail, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Cen...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) dominant male silverback 'Makumba' aged 32 years resting on his back on the forest floor, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Centr...

Fiona Rogers / Western lowland gorilla (Gorilla gorilla gorilla) infant 'Sopo' aged 18 months riding on his mother 'Mopambi's' back, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Republic. D...

Fiona Rogers / Western lowland gorilla (Gorilla gorilla gorilla) dominant male silverback 'Makumba' aged 32 years head and shoulders portrait, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African R...

Fiona Rogers / Western lowland gorilla (Gorilla gorilla gorilla) juvenile male 'Mobangi' aged 5 years head and shoulders portrait, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Republic. Dec...

Fiona Rogers / Western lowland gorilla (Gorilla gorilla gorilla) juvenile male 'Tembo' aged 4 years crossing a river bi-pedally, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Republic. Decem...

Fiona Rogers / Western lowland gorilla (Gorilla gorilla gorilla) female 'Malui' carrying her stillborn infant in her arms, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Republic. December 20...

Fiona Rogers / Western lowland gorilla (Gorilla gorilla gorilla) juvenile male 'Mobangi' aged 5 years standing with sub-adult male 'Kunga' aged 13 years in Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Cent...

Fiona Rogers / Western lowland gorilla (Gorilla gorilla gorilla) infant 'Sopo' aged 18 months head and shoulders portrait, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Republic. December 20...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla). dominant male silverback 'Makumba' aged 32 years, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Republic, December 2011

Christophe Courteau / Eastern lowland gorilla (Gorilla beringei graueri) hand and foot of young gorilla, Kahuzi Biega NP, Democratic Republic of Congo.

Edwin Giesbers / Tiny baby Western lowland gorilla (Gorilla gorilla gorilla) attempting to walk and holding onto mother's hand. Endangered species. Captive; Apenheul zoo; the Netherlands.

Edwin Giesbers / Young Western lowland gorilla (Gorilla gorilla gorilla) sleeping in mothers arms. Endangered species. Captive; Apenheul zoo; the Netherlands.

Edwin Giesbers / Portrait of Western lowland gorilla (Gorilla gorilla gorilla) sitting with hands clasped. Endangered species. Captive; Apenheul zoo; the Netherlands.

Edwin Giesbers / Juvenile Western lowland gorilla (Gorilla gorilla gorilla) standing on hind legs, holding one arm. Endangered species. Captive; Apenheul zoo; the Netherlands.

Guy Edwardes / Western lowland gorilla (Gorilla gorilla gorilla) captive, Port Lympne Wild Animal Park, Kent, England, June 2007

Eric Baccega / Silverback male Eastern lowland gorilla (Gorilla beringei graueri) intimidation display by chest beating, equatorial forest of Kahuzi Biega Park, Democratic Republic of Congo, Africa, March 2009

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

Eric Baccega / Male silverback Western lowland gorilla (Gorilla gorilla gorilla) portrait, captive, Beauval ZooPark, France

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

Karl Ammann / Baby Western lowland gorilla (Gorilla g gorilla), victim of the illegal bushmeat and pet trades, Central Africa. After shooting an adult gorilla, bushmeat hunters capture the babies for additional pro...

Karl Ammann / Baby Western lowland gorilla (Gorilla g gorilla) head portrait - victim of the illegal bushmeat and pet trade, Pointe Nior, Democratic Republic of Congo. After shooting an adult gorilla, bushmeat hunt...

Jabruson / Western lowland gorilla wild male feeding {Gorilla gorilla gorilla} Lokoue bai, Odzala NP, Dem Rep of Congo

Jabruson / Western lowland gorilla with wet rear, Lokoue bai, Odzala NP, Democratic Republic of Congo.

Jabruson / Western lowland gorilla male sitting amongst Congo Sedge nutgrass {Gorilla gorilla gorilla} Lokoue bai, Odzala National Park, Democratic Republic of Congo.

Jabruson / Western lowland gorilla male feeding {G g gorilla} Lokoue bai, Odzala NP, Democratic Republic of Congo.

Jabruson / Western lowland gorilla male feeding {G g gorilla} Lokoue bai, Odzala NP, Democratic Republic of Congo.

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

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

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

Jabruson / Western lowland gorilla male silverback "Faust" eating soil for mineral content in bai (forest clearing) Odzala NP, Democratic Republic of Congo. Died July 2004, probably due to Ebola virus.

Jabruson / Western lowland gorilla family group feeding in Bai /forest clearing {Gorilla gorilla gorilla } Odzala NP, Democratic Republic of Congo.

Jabruson / Western lowland gorillas and Forest elephants in clearing in tropical rainforest, Obandas Bai, Odzala NP, Democratic Republic of Congo.

Karl Ammann / Silverback Eastern lowland gorilla (Gorilla beringei graueri) in forest, Kahuzi Biega, Democratic Republic of the Congo.

Tom Vezo / Lowland gorilla adult male in zoo, USA

Tom Vezo / Lowland gorilla mother & baby. Pittsburg Zoo, USA

Jabruson / Western lowland gorilla silverback male eating soil for mineral content, Odzala NP, Democratic Republic of Congo.

Jabruson / Western lowland gorilla male silverback portrait, Odzala NP, Democratic Republic of Congo.

Jabruson / Male Western lowland gorilla silverback eating soil for mineral content in Bai (rainforest clearing) Odzala NP, Democratic Republic of Congo, Lokoue Bai white silverback.

Jabruson / Male Western lowland gorilla adopts display posture in reaction to seeing other male in Bai (rainforest clearing) Odzala NP, Democratic Republic of Congo, Obandas Bai,

Jabruson / Male Western lowland gorilla displaying at sight of another male in rainforest clearing, Odzala NP, Democratic Republic of Congo.

Jabruson / Western lowland gorilla family foraging in rainforest clearing, Odzala NP, Democratic Republic of Congo. Dominant silverback male on right.

Jabruson / Western lowland gorilla family feeding in rainforest clearing, Odzala NP, Democratic Republic of Congo.

Jabruson / Western lowland gorilla female carrying infant and feeding in bai (forest clearing), Odzala NP, Democratic Republic of Congo.

Jabruson / Western lowland gorilla family feeding in Moba bai forest clearing in Odzala NP, Democratic Republic of Congo.

Jabruson / Western lowland gorillas and Forest elephant in rainforest clearing, Odzala NP, Democratic Republic of Congo.

Karl Ammann / Blackback Eastern lowland gorilla head profile portrait {Gorilla beringei graueri} Kahuzi Biega, Democratic Republic of Congo.

Karl Ammann / Blackback Eastern lowland gorilla {Gorilla beringei graueri} Kahuzi Biega, Democratic Republic of Congo.

Jabruson / Young Western lowland gorilla crosses stream walking on back legs (Gorilla gorilla gorilla) Odzala NP, Democratic Republic of Congo.

Jabruson / Eastern lowland gorilla feeding in tree {Gorilla beringei graueri} Lake Kivu, Democratic Republic of the Congo

Jabruson / Silverback Western lowland gorilla eats soil for mineral content {Gorilla gorilla gorilla} Odzala NP, Democratic Republic of Congo.

Jabruson / Silverback Western lowland gorilla crosses bai clearing in rainforest {Gorilla gorilla gorilla } Odzala NP Democratic Republic of Congo.

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

TJ Rich / Portrait of male silverback Western Lowland gorilla {Gorilla gorilla gorilla} with fingers in mouth UK

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

TJ Rich / Two Western lowland gorillas face to face {Gorilla gorilla gorilla} UK

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

Jabruson / Western lowland gorilla (Gorilla gorilla gorilla) silverback 'Makumba' portrait, leader of tourist habituated gorilla family group, Bai Hokou, Dzanga-Ndoki National Park, Central African Republic.

Jabruson / Western lowland gorilla (Gorilla gorilla gorilla) black-back male 'Kunga' foot detail, Bai Hokou, Dzanga-Ndoki National Park, Central African Republic

Jabruson / Western lowland gorilla (Gorilla gorilla gorilla) black-back male 'Kunga' hand and foot detail, partly obscured by vegetation, Bai Hokou, Dzanga-Ndoki National Park, Central African Republic

Jabruson / Western lowland gorilla (Gorilla gorilla gorilla) 'Mosoko' eating termites from termite mound. 'Mosoko' is a member of the habituated gorilla family of 'Makumba'. Bai Hokou, Dzanga-Ndoki National Park...

Jabruson / Western lowland gorilla (Gorilla gorilla gorilla) silverback 'Makumba' moving through the forest, blurred motion, he is the leader of the habituated gorilla family that goes by the same name, Bai Hoko...

Jabruson / Western lowland gorilla (Gorilla gorilla gorilla) silverback 'Makumba' sleeping after a morning of feeding. 'Makumba' is the leader of the habituated gorilla family that goes by the same name, Bai Hok...

Jabruson / Western lowland gorilla (Gorilla gorilla gorilla) silverback 'Makumba' sleeping after a morning of feeding. 'Makumba' is the leader of the habituated gorilla family that goes by the same name, Bai Hok...

Jabruson / Western lowland gorilla (Gorilla gorilla gorilla) silverback 'Makumba' resting during a morning of feeding. He is the group leader of the habituated gorilla family that goes by the same name, Bai Hoko...

Jabruson / Western lowland gorilla (Gorilla gorilla gorilla) 'Mosoko' eating termites from termite mound. 'Mosoko' is a member of the habituated gorilla family of 'Makumba'. Bai Hokou, Dzanga-Ndoki National Park...

Mark Carwardine / Western lowland gorilla (Gorilla gorilla gorilla) captive, from rainforests of West and Central Africa, Endangered species, Bristol Zoo

Mark Carwardine / Western lowland gorilla (Gorilla gorilla gorilla) baby lying on mother's back, captive, from rainforests of West and Central Africa, Endangered species, Bristol Zoo

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) juvenile male 'Mobangi' aged 5 years resting on the forest floor picking his nose, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central Afri...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) rear view of sub-adult male 'Kunga' aged 13 years looking up, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Republic. Decembe...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) rear view of dominant male silverback 'Makumba' aged 32 years walking along a forest trail followed by the juveniles of the group, Bai Hokou, Dzanga S...