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I've not been to the Congo.

Other People's Trip Reports
Odzala National Park Newsletter, March 2012: including Water Chevrotains, Northern Talapoin and Bongos.

Dzangha Sangha and Nouabalé-Ndoki, 2010: Sjef Ollers, 3 weeks and 23+ species including Lowland Gorilla, Brush-tailed Porcupine and Red River Hog.