We just learned about the Mantled Guereza.
Another type of Old World Monkey is the Zanzibar Red Colobus, also called Kirk's red colobus.
This is a type of monkey that lives only on the island of Zanzibar.
Their fur can be white, red and black.
Usually their back is red, and they have a black stripe on their sides and arms, their belly is white and their face is black.
They don't get very big, only about 25 pounds.
One funny thing is that these monkeys smell bad, and are called "kima punju" which means "poison monkey" and some people used to think that their bad smell was bad magic that killed the trees.
Most primates have a thumb that sticks out a little different, but these monkeys are part of the "colobus" family, which means "he cut short".
The name is because they only have a tiny little thumb, but they have longer fingers than most monkeys.
(from: wikipedia - zanzibar red colobus)
The Red Colobus Monkey of Zanzibar, One Of The Rarest Primates In The World - Tekweni
Kid Facts - Blast from the past: Marbled Cat