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

Christophe Courteau / Porters carrying luggage and equipment down from the Nyiragongo Volcano, Democratic Republic of Congo (RDC). September 2015.

Christophe Courteau / Eastern lowland gorilla (Gorilla beringei graueri) young gorilla exploring forest, Kahuzi Biega NP, Democratic Republic of Congo. Gorille de plaine de l'Est, Republique Democratique du Congo.

Christophe Courteau / Eastern lowland gorilla (Gorilla beringei graueri) female climbing tree, Kahuzi Biega NP, Democratic Republic of Congo. Gorille de plaine de l'Est, Republique Democratique du Congo.

Christophe Courteau / Eastern lowland gorilla (Gorilla beringei graueri) young gorialla playing in forest, Kahuzi Biega NP, Democratic Republic of Congo. Gorille de plaine de l'Est, Republique Democratique du Congo.

Christophe Courteau / Eastern lowland gorilla (Gorilla beringei graueri) family group in forest, Kahuzi Biega NP, Democratic Republic of Congo. Gorille de plaine de l'Est, Republique Democratique du Congo.

Christophe Courteau / Eastern lowland gorilla (Gorilla beringei graueri) family group with female showing aggression, Kahuzi Biega NP, Democratic Republic of Congo. Gorille de plaine de l'Est, Republique Democratique du C...

Christophe Courteau / Eastern lowland gorilla (Gorilla beringei graueri) silverback dominant male in forest, looking up, Kahuzi Biega NP, Democratic Republic of Congo. Gorille de plaine de l'Est, Republique Democratique d...

Christophe Courteau / Eastern lowland gorilla (Gorilla beringei graueri) silverback dominant male feeding in forest, Kahuzi Biega NP, Democratic Republic of Congo. Gorille de plaine de l'Est, Republique Democratique du Co...

Christophe Courteau / Eastern lowland gorilla (Gorilla beringei graueri) silverback dominant male, portrait, Kahuzi Biega NP, Democratic Republic of Congo. Gorille de plaine de l'Est, Republique Democratique du Congo.

Christophe Courteau / Fishermen on Lake Kivu at dawn, using traditional fishing rods and paraffin lights. Democratic Republic of Congo, August 2010

Christophe Courteau / Mountain gorilla (Gorilla beringei) two young gorillas grooming, Virunga NP, Democratic Republic of Congo Gorille de montagne

Christophe Courteau / Mountain gorilla (Gorilla beringei) two young gorillas playing in the forest, Virunga NP, Democratic Republic of Congo Gorille de montagne

Christophe Courteau / Mountain gorilla (Gorilla beringei) mother carrying baby on her back, Virunga NP, Democratic Republic of Congo Gorille de montagne

Christophe Courteau / Eastern lowland gorilla (Gorilla beringei graueri) family group resting in forest with silverback male, Kahuzi Biega NP, Democratic Republic of Congo. Gorille de plaine de l'Est, Republique Democrati...

Christophe Courteau / Mountain gorilla (Gorilla beringei) feeding in forest, Virunga NP, Democratic Republic of Congo Gorille de montagne

Christophe Courteau / Mountain gorilla (Gorilla beringei) baby riding on mother's back, Virunga NP, Democratic Republic of Congo Gorille de montagne

Christophe Courteau / Mountain gorilla (Gorilla beringei) in forest, Virunga NP, Democratic Republic of Congo Gorille de montagne

Christophe Courteau / Eastern lowland gorilla (Gorilla beringei graueri) young gorilla, Kahuzi Biega NP, Democratic Republic of Congo. Gorille de plaine de l'Est, Republique Democratique du Congo.

Christophe Courteau / Eastern lowland gorilla (Gorilla beringei graueri) young gorilla in forest, Kahuzi Biega NP, Democratic Republic of Congo. Gorille de plaine de l'Est, Republique Democratique du Congo.

Christophe Courteau / Eastern lowland gorilla (Gorilla beringei graueri) baby playing in mother's arms, Kahuzi Biega NP, Democratic Republic of Congo. Gorille de plaine de l'Est, Republique Democratique du Congo.

Christophe Courteau / Collection of bones of dead Elephants from Kahuzi-Biega NP, Democratic Republic of Congo, August 2010. Ossuaires d'Elephants

Christophe Courteau / Landscape of the South Kivu Province, area of Bukavu, Democratic Republic of Congo, August 2010

Christophe Courteau / Eastern lowland gorilla (Gorilla beringei graueri) young gorilla with arm injured after being caught in a snare, Kahuzi Biega NP, Democratic Republic of Congo. Gorille de plaine de l'Est, Republique...

Christophe Courteau / Eastern lowland gorilla (Gorilla beringei graueri) family group resting in forest, Kahuzi Biega NP, Democratic Republic of Congo. Gorille de plaine de l'Est, Republique Democratique du Congo.

Christophe Courteau / Eastern lowland gorilla (Gorilla beringei graueri) baby nestling in mother's arms, Kahuzi Biega NP, Democratic Republic of Congo. Gorille de plaine de l'Est, Republique Democratique du Congo.

Christophe Courteau / Eastern lowland gorilla (Gorilla beringei graueri) baby playing, Kahuzi Biega NP, Democratic Republic of Congo. Gorille de plaine de l'Est, Republique Democratique du Congo.

Christophe Courteau / Eastern lowland gorilla (Gorilla beringei graueri) baby playing, Kahuzi Biega NP, Democratic Republic of Congo. Gorille de plaine de l'Est, Republique Democratique du Congo.

Christophe Courteau / Eastern lowland gorilla (Gorilla beringei graueri) silverback dominant male in forest vegetation, Kahuzi Biega NP, Democratic Republic of Congo. Gorille de plaine de l'Est, Republique Democratique du...

Christophe Courteau / Close-up of Eastern lowland gorilla (Gorilla beringei graueri) silverback dominant male in thick forest vegetation, Kahuzi Biega NP, Democratic Republic of Congo. Gorille de plaine de l'Est, Republiq...

Christophe Courteau / Park ranger in the Kahuzi-Biega National Park, habitat of the Eastern Lowland Gorilla (Gorilla gorilla graueri), walking under spiders' web in the forest, Democratic Republic of Congo, August 2010

Christophe Courteau / Swamps in the Kahuzi-Biega National Park, habitat of the Eastern Lowland Gorilla (Gorilla gorilla graueri) Democratic Republic of Congo / Gorille de plaine de l'Est.