In pictures: Gorilla guardians

Augustin Kambale, 30, is a wildlife ranger caring for the last 100 mountain gorillas still alive in the Democratic Republic of Congo after years of fighting.

He works in the southern sector of Africa’s oldest reserve, the 8,000 sq km Virunga National Park, in eastern DR Congo.

Of the 700 mountain gorillas left in the world, 320 are in Uganda and the remainder are in the Virunga Mountains which also cross into Uganda and Rwanda.