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

Andy Rouse / Mountain gorilla (Gorilla beringei beringei) silverback male portrait, Volcanoes NP, Virunga Mountains, Rwanda

Mary McDonald / Adult Mountain gorilla (Gorilla beringei beringei) holding baby, Hirwa group, Volcanoes National Park, Rwanda

Christophe Courteau / Mountain gorilla (Gorilla beringei beringei), silverback and juvenile son. Volcanoes National Park. Rwanda.

Christophe Courteau / Mountain gorilla (Gorilla beringei beringei), dominant silverback in forest clearing. Volcanoes National Park, Rwanda.

Christophe Courteau / Mountain gorilla (Gorilla beringei beringei) blackback, juvenile male demonstrating power. Volcanoes National Park, Rwanda.

Christophe Courteau / Mountain gorilla (Gorilla beringei beringei) blackback, juvenile male demonstrating power. Volcanoes National Park, Rwanda.

Christophe Courteau / Mountain gorilla (Gorilla beringei beringei) female with baby, portrait. Volcanoes National Park, Rwanda.

Christophe Courteau / Mountain gorilla (Gorilla gorilla beringei) playing, rolling down a slope, part of the Amahoro Gorilla Group, Volcanoes National Park, Rwanda.

Christophe Courteau / Mountain gorilla (Gorilla gorilla beringei) feeding, part of the Agashya Gorilla Group, Volcanoes National Park, Rwanda.

Christophe Courteau / Family of Mountain gorillas (Gorilla gorilla beringei) with a silverback, grooming and looking around, part of the HIrwa Gorilla Group, Volcanoes National Park, Rwanda.

Ingo Arndt / Rainforest slope Mount Bisoke (3711m), Mountain gorilla habitat (Gorilla gorilla beringei), Parc National des Volcans, Rwanda

Ingo Arndt / Golden monkey (Cercopithecus mitis kandti) looking down from tree, Parc National des Volcans, Rwanda

Suzi Eszterhas / Mountain Gorilla (Gorilla gorilla beringei) mother lying on back and holding baby age one year. Parc National des Volcans, Rwanda. Endangered species

Cyril Ruoso / Mountain Gorilla (Gorilla gorilla beringei) female with her three month old newborn, Parc National Des Volcans, Rwanda

Cyril Ruoso / Mountain Gorilla (Gorilla gorilla beringei) close-up portrait of a silverback in the rain, 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

Christophe Courteau / Mountain Gorilla (Gorilla beringei) female holding baby in dense vegetation in Volcanoes National Park, Rwanda, at an altitude of 3000m, short dry season, February

Christophe Courteau / Mountain gorilla (Gorilla beringei) baby in mother's arms. 3000 metres above sea level in Volcanoes National Park, Rwanda. Short dry season, February

Christophe Courteau / Mountain Gorilla (Gorilla beringei) dominant male silver back sitting amongst vegetation. 2700 metres above sea level in Volcanoes National Park, Rwanda. short dry season, February

Christophe Courteau / Silverback Mountain gorilla (Gorilla beringei) in the bamboo forest, this is Munyinya the leader of Hirwa group, Sabyinyo volcano, Volcano National Park, Rwanda

Christophe Courteau / Mountain gorillas (Gorilla beringei) Hirwa group led by the silverback dominant male Munyinya, Volcanoes National Park, Rwanda, elevation 2610 m

Christophe Courteau / Mountain gorilla silverback, male called Munyinya, (Gorilla beringei) with tourist taking photo, part of Hirwa Group, Volcanoes National Park, Rwanda

Ole Jorgen Liodden / Young Mountain Gorilla (Gorilla beringei beringei) portrait, looking thoughtful. Parc des Volcans National Park, Rwanda, December.

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

Eric Baccega / Young Mountain gorilla standing up in the rain (Gorilla beringei beringei) Volcanoes National Park, Rwanda, Africa, March 2009

Andy Rouse / Parc National des Volcans / Volcanoes NP, Virunga Mountains, Rwanda, Africa, habitat of the Mountain gorillas

Andy Rouse / Mountain gorilla (Gorilla beringei beringei) silverback moving through habitat, Volcanoes NP, Virunga mountains, Rwanda

Andy Rouse / Mountain gorilla (Gorilla beringei beringei) close up of eye, Volcanoes NP, Virunga mountains, Rwanda

Andy Rouse / Mountain gorilla (Gorilla beringei) blackback male in rainforest, in front of Sabinyo volcano, Volcanoes NP, Virunga mountains, Rwanda (non-ex)

Andy Rouse / Mountain gorilla (Gorilla beringei beringei) silverback watching through forest, Virunga Mountains, Volcanoes NP, Rwanda (non-ex)

Andy Rouse / Mountain gorilla (Gorilla beringei beringei) juvenile hanging from branch, Volcanoes NP, Virunga mountains, Rwanda

Andy Rouse / Mountain gorilla (Gorilla beringei beringei) silverback male scratching head, drunk on bamboo shoots, Volcanoes NP, Virunga mountains, Rwanda Note - if gorillas eat an excess of bamboo shoots they ca...

Andy Rouse / Mountain gorilla (Gorilla beringei beringei) mother and baby with hairy head, Volcanoes NP, Virunga mountains, Rwanda

Andy Rouse / Mountain gorilla (Gorilla beringei beringei) close up of feet showing toe curled around branch, Volcanoes NP, Virunga mountains, Rwanda

Andy Rouse / Mountain gorilla (Gorilla beringei beringei) mother cradling and kissing foot of 1 week baby, Volcanoes NP, Virunga Mountains, Rwanda

Andy Rouse / Mountain gorilla (Gorilla beringei beringei) silverback male playing in habitat, drunk on bamboo shoots, Volcanoes NP, Virunga mountains, Rwanda Note - if gorillas eat an excess of bamboo shoots they...

Andy Rouse / Mountain gorilla (Gorilla beringei beringei) silverback, face portrait, Volcanoes NP, Virunga mountains, Rwanda

Andy Rouse / Mountain gorilla (Gorilla beringei beringei) silverback portrait, Volcanoes NP, Virunga mountains, Rwanda

Andy Rouse / Mountain gorilla (Gorilla beringei beringei) baby with hairy head, Volcanoes NP, Virunga mountains, Rwanda

Andy Rouse / Mountain gorilla (Gorilla beringei beringei) mother with young and silverback male in background, Volcanoes NP, Virunga Mountains, Rwanda

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

Ingo Arndt / Mikeno Volcano (3634 meters) with lenticular cloud, Republic of the Congo in the Virunga heartland, view from 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

Suzi Eszterhas / Mountain gorilla {Gorilla beringei} mother with 10-months infant in bamboo forest, Parc National des Volcans, Rwanda

Suzi Eszterhas / Mountain gorilla {Gorilla beringei} 12-months twins climbing tree, Parc National des Volcans, Rwanda

Suzi Eszterhas / Mountain gorilla {Gorilla beringei} mother holding newborn baby, Parc National des Volcans, Rwanda

Suzi Eszterhas / Mountain gorilla {Gorilla beringei} mother holding 10-months infant, Parc National des Volcans, Rwanda

Suzi Eszterhas / Mountain gorilla {Gorilla beringei} mother holding 10-months infant, Parc National des Volcans, Rwanda

Anup Shah / Mountain gorilla silverback portrait (Gorilla beringei) Parc des Volcans National Park, Rwanda

Anup Shah / Mountain gorilla portrait (Gorilla beringei) pensive male, Parc des Volcans National Park, Rwanda

Anup Shah / Mountain gorilla portrait eating plant stem (Gorilla beringei) looking throughtful, Parc des Volcans National Park, Rwanda

Jabruson / Rwandan children, Kinigi, Parc des Volcans NP, Rwanda

Jabruson / Ranger with spiked bamboo Buffalo snares confiscated from Ruherngeri, Parc des Volcans NP, Rwanda

Jabruson / Child with drawing of Mountain gorilla, Parc des Volcans NP, Rwanda. encourages involvement in wildlife conservation

Jabruson / Deforestation of national park for subsistence agriculture, Parc des Volcans National Park, Rwanda

Anup Shah / Mountain gorilla mother + baby {Gorilla beringei} Parc National des Volcans, Rwand

IAN REDMOND / Forest Elephants with trunks raised among Giant Lobelia. Rwanda Parc National des Volcans

Anup Shah / Silverback mountain gorilla sitting (Gorilla gorilla beringei) Parc des Volcans, Rwanda

Anup Shah / Juvenile Mountain gorilla in tree {Gorilla g beringei} Parc National des Volcans, Rwanda

Anup Shah / Male Mountain gorilla at rest {Gorilla beringei} Parc National des Volcans Rwanda

Anup Shah / Silverback mountain gorilla head portrait (Gorilla gorilla beringei) Parcs des Volcans NP Rwanda

Anup Shah / Silverback mountain gorilla sitting portrait (Gorilla gorilla beringei) Parc des Volcans Rwanda NP

Anup Shah / Silverback mountain gorilla sitting (Gorilla gorilla beringei) Parc des Volcans Rwanda NP Africa

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

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

Anup Shah / Male Mountain gorilla {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

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

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

Mary McDonald / Adult Mountain gorilla (Gorilla beringei beringei) holding baby , Hirwa group, Volcanoes National Park, Rwanda

Jeff Foott / Golden Monkey (Cercopithecus kandti) pair, Parc National des Volcans, Rwanda

Jeff Foott / Golden Monkey (Cercopithecus kandti), Parc National des Volcans, Rwanda

Jeff Foott / Golden Monkey (Cercopithecus kandti), Parc National des Volcans, Rwanda

Paul Souders/ Worldfoto / Mountain Gorilla (Gorilla gorilla beringei) silverback, Parc National des Volcans, Rwanda

Christophe Courteau / Mountain gorilla (Gorilla gorilla beringei), group relaxing. Volcanoes National Park, Rwanda.

Christophe Courteau / Mountain gorilla (Gorilla gorilla beringei), group relaxing. Volcanoes National Park, Rwanda.

Christophe Courteau / Mountain gorilla (Gorilla gorilla beringei), newborn 10 day old baby asleep in mother's arms, portrait. Volcanoes National Park. Rwanda.

Christophe Courteau / Mountain gorilla (Gorilla gorilla beringei), two males, silverback fighting a blackback. Volcanoes National Park. Rwanda.

Christophe Courteau / Mountain gorilla (Gorilla gorilla beringei), baby in arms of mother. Volcanoes National Park. Rwanda.

Christophe Courteau / Mountain gorilla (Gorilla gorilla beringei), female asleep with baby. Volcanoes National Park, Rwanda.

Jami Tarris / Mountain Gorilla (Gorilla gorilla beringei) young, Parc National des Volcans, Rwanda

Jami Tarris / Mountain Gorilla (Gorilla gorilla beringei) young feeding, Parc National des Volcans, Rwanda

Christophe Courteau / Silverback Mountain gorilla (Gorilla gorilla beringei) feeding on wild celery, part of the Susa Gorilla Group, Volcanoes National Park, Rwanda.