The river is navigable south of Mundame for about 100 kilometres (62 mi) as it flows through the coastal plain before entering mangrove swamps, where it splits into numerous small channels that empty into the Cameroon estuary complex.
One can see sea eagles, herons, snakes and monkeys, as well as multicolored parrots on the trees, while on the surface of the water there dance butterflies and dragonflies the size of sparrows.
[6] A Swede named Knut Knutson lived for some years in the upper Mungo valley at a time when the Germans were asserting their claim over the area as a colony.
He provides an interesting if somewhat fanciful account of traditions that a "Biaffra" tribe, based on the upper Mungo, once ruled an extensive kingdom stretching as far north as Lake Chad and south to the Congo River.
The leader on the Mungo river was King Bell, who maintained a blockade for some months but eventually was forced to yield due to disunity among his people and the power of an armed steamboat.