Patas monkey

Males and females are quite different in size and appearance. Reaching a length of almost 90 cm and a weight of up to 13 kg, male Patas monkeys are almost twice as large as females. The contrasts in the reddish brown coloured fur are more conspicuous in males than in females. A typical Patas monkey group consists of one adult male and several females with their young of different ages. But there are also groups consisting exclusively of males. Those males are former "harem males", which have been expelled by a rival or young males, which reached sexual maturity and had to leave their mother's group. While searching for food the members of the group spread themselves out over a wide area. Being distant to each other is part of their strategy to be as inconspicuous as possible in order to escape the attention of predators. In contrast to most other monkey species Patas monkeys are quite silent. But if they are - in spite of all their effort to be inconspicuous - detected by a predator, their only chance to escape is to run as fast as possible; opportunities to hide themselves are extremely scarce in their habitat.

 

 

The "harem male" keeps itself extraordinarily far away from the other group members and doesn't seem to be integrated very closely into the group. It isn't the leader of the group either; this is the task of the highest ranking female. Being a look-out is the function of the "harem male". It often can be seen in places, where it is able to survey the surroundings for predators and other Patas monkey groups. As long as it is able to fulfil its duties and isn't expelled by another male, it is allowed to stay with the group and father descendants. Young are born after a pregnancy of half a year and are weaned at an age of six months. They become sexually mature when two and a half year old. Patas monkeys reach an age of about 20 years.