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Monkey

Monkey

The Vervet Monkey (Chlorocebus pygerythrus), sometimes simply known as the Vervet, is an Old World monkey in the family Cercopithecidae. (The common term "vervet" is also sometimes used to refer to all the members of the genus Chlorocebus.)

The Vervet Monkey ranges throughout much of Southern and East Africa, being found from Ethiopia, Somalia, Sudan and south to South Africa. It is not found west of the Great Rift Valley or Luangwa River, where replaced by the closely related Malbrouck (C. cynosuros). The two have often been considered conspecific, or considered subspecies of a widespread C. aethiops. The Vervet Monkey inhabits savanna lands and mountains up to 4000 m (13,100 ft.).

Physical CharacteristicsEdit

This small, black-faced monkey is common in East Africa as it adapts easily to many environments and is widely distributed.

There are several subspecies of vervet monkeys, but generally the body is a greenish-olive or silvery-gray. The face, ears, hands, feet and tip of the tail are black, but a conspicuous white band on the forehead blends in with the short whiskers. The males are slightly larger than the females and easily recognized by a turquoise blue scrotum and red penis.

The vervet is classified as a medium-sized to large monkey-males weigh up to 17 pounds. Its tail is usually held up, with the tip curving downward. Its arms and legs are approximately the same length.

HabitatEdit

In East Africa these monkeys can live in mountain areas up to about 13,000 feet, but they do not inhabit rain forests or deserts. Their preferred habitat is acacia woodland along streams, rivers and lakes. They are diurnal, sleeping and eating in trees from which they seldom venture.

BehaviorEdit

Vervet society is built on complex but stable social groups (called troops) of 10 to 50 individuals—mainly adult females and their immature offspring. There is a strict social hierarchy among troop members; a mother's social standing predetermines her offsprings, and even adults in a family must submit to juveniles of families with higher social status. Males transfer troops at least once in their lifetime, beginning at puberty. This is a dangerous process not only because of the predators they may encounter in transit, but also because troops dislike immigrants.

Grooming is important in a monkey's life. Vervets (as well as most other primates) spend several hours a day removing parasites, dirt or other material from one another's fur. In the primates' hierarchy, dominant individuals get the most grooming. The hierarchical system also controls feeding, mating, friendships and even survival.

Close social bonds with female relatives begin to develop in infancy, relationships thought to endure throughout life. Infants are of great interest to the other monkeys in the troop; subadult females do everything possible to be allowed to groom or hold a new infant.

After a birth, the mother licks the infant clean, bites off the umbilical cord and eats the afterbirth. The newborn has black hair and a pink face; it will be 3 or 4 months before it acquires adult coloration.

The infant spends the first week of life clinging to its mother's stomach. After about the third week, it begins to move about by itself and attempts to play with other young monkeys. Vervet mothers are proprietary in the treatment of their babies, and some will not allow young or even other adult females to hold or carry them. Others gladly leave their infants in charge of any interested female. Researchers report that usually a female's close family members will have the most unrestricted access to the babies. As the infants grow, they play not only with monkeys but with other young animals. Young vervets chase one another, wrestle, tumble and play "king-of-the-castle," taking turns pushing each other off a high perch.

DietEdit

Leaves and young shoots are most important in the vervet diet, but bark, flowers, fruit, bulbs, roots and grass seeds are also consumed. The mainly vegetarian diet is supplemented with insects and grubs. Vervets rarely drink water.

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