Cyril Ruoso / Tropical frog (Hyperolius sp) trying to climb onto leaf, Bateke Plateau NP, Gabon.

Cyril Ruoso / Chimpanzee (Pan troglodytes) close up portrait, Bakoumba sanctuary, Gabon. Non-ex

Steve O. Taylor (GHF) / Cut trees in the Waka forest, Gabon, Central Africa, 2008-2009.

Jabruson / Common House Martin (Delichon urbicum) flying above pile of hardwood timber logs in storage depot. Lope National Park, Libreville, Gabon.

Barrie Britton / Flooded forest, Loango National Park, Gabon. Photograph taken on location for BBC 'Africa' series, January 2011.

Eric Baccega / Western lowland gorilla (Gorilla gorilla gorilla) reintroduction from Beauval zoo, France through Gorilla Protection Project. Unloading cage containing female Gorilla from helicopter, near habituation...

Eric Baccega / Helicopter transporting Western lowland gorilla (Gorilla gorilla gorilla) female to habituation island prior to reintroduction by Gorilla Protection Project. Gorilla from Beauval zoo, France. Bateke P...

Eric Baccega / Mpassa river and Bateke Plateau National Park, aerial view. Site for reintroduction of two female Western lowland gorilla (Gorilla gorilla gorilla) from Beauval zoo through Gorilla Protection Project....

Eric Baccega / Beauval zoo staff checking and comforting Western lowland gorilla (Gorilla gorilla gorilla) female in transit. To be reintroduced through Gabon Gorilla Protection Project to Bateke Plateau National Pa...

Eric Baccega / Western lowland gorilla (Gorilla gorilla gorilla) reintroduction to Bateke Plateau National Park through Gorilla Protection Project. Loading crate with female from Beauval Zoo onto aircraft. Librevill...

Eric Baccega / Western lowland gorilla (Gorilla gorilla gorilla) reintroduction to Bateke Plateau National Park through Gorilla Protection Project. Transporting crate with female from Beauval Zoo onto second aircraf...

Eric Baccega / Western lowland gorilla (Gorilla gorilla gorilla) reintroduction to Bateke Plateau National Park through Gorilla Protection Project. Zookeeper from Beauval Zoo checking and comforting female in cage a...