Mary McDonald / Adult Mountain gorilla (Gorilla beringei beringei) holding baby, Hirwa 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.

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

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

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

Christophe Courteau / Mountain gorilla (Gorilla beringei) baby eating, part of Hirwa group, Volcanoes National Park. Rwanda, elevation 2630m

Christophe Courteau / Young Mountain gorilla (Gorilla beringei) this is Gakuru, one of 2 twin infants from female Kabatwa in Hirwa Group, on slopes of the Sabyinyo Volcano, Volcanoes National Park, Rwanda elevation 2610 m

Christophe Courteau / Young Mountain gorilla (Gorilla beringei) this is Gakuru, one of 2 twin infants from female Kabatwa in Hirwa Group, on slopes of the Sabyinyo Volcano, Volcanoes National Park, Rwanda elevation 2610 m

Christophe Courteau / Mountain gorilla (Gorilla beringei) mother with young from Hirwa group. This is Gakuru, one of 2 twin infants from female Kabatwa, on slopes of the Sabyinyo Volcano, Volcanoes National Park, Rwanda e...

Christophe Courteau / Mountain gorilla (Gorilla beringei) 4 week infant , Hirwa group, Volcanoes National Park, Rwanda, elevation 2610m