Silver Back Mountain Gorilla eating in the open vegetation. Hirwa Group. Munyinya is the leader. (Gorilla gorilla beringei). Sabyinyo volcano. Volcano National Park. Rwanda. Mâle Dos argenté Gorille de montagne. Groupe Hirwa, Munyinya en est le leader. (Gorilla gorilla beringei). Pentes du volcan Sabyinyo . Parc National des Volcans. Rwanda.