The Sanje mangabey is one of Africa’s rarest monkeys, with only a few thousand left in two forest blocks of the Udzungwa Mountains. It is grey with a pale belly and a long tail, and travels in noisy groups that call to each other with a loud whoop-gobble.
A group near the Sanje waterfall trail has been habituated for research, and with a park guide you can often spend an hour with them. Finding the mangabey, the Udzungwa red colobus and the Udzungwa forest partridge on the same trip is a real achievement.










