Grzimek was an amazing person - I remember his television programs.He also produced some classical films on Africa, one of which was "Serengeti must not die", and edited a multi-volume Encyclopedia of Animals. The film was in part responsisible for Tanzania's decision to extend the park. Tragically, Grzimek's son Michael died in a plane crash when surveying the area.
But let me show some primates of the area:
This MS shows the De Brazza monkey, patas monkey,the greater galalgo, and L"Hoest monkey.
The accompanying MS shows the blue monkey and also the chimpanzee.