Off the coast of Central Africa lies an isolated island, covered by primeval rainforest and surrounded by dark ocean waters, inhabited by a greater variety of species than nearly any other place on Earth this terra incognita is called BIOKO. The ruler of this realm is one of the world's least known primate species, the drill.

• DirectorOliver Goetzl
• Release25 July 2019
• GenreDocumentary
• Duration0h 56m
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  Studio Hamburg DocLights