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Monkeys » Black-handed Spider Monkey

Black-handed Spider MonkeyScientific Name:  Ateles geoffroyi

Interesting Facts
The Black-handed Spider Monkey is listed as a vulnerable species and population estimates from Biologist Ronald Sanchez at the University of Costa Rica show a 72% decline in their population over 12 years from 26,000 individuals in 1995 to 7,225 individuals in 2007.    This species is very susceptible to human interference in its environment and because females reproduce on average only every three years it is difficult for groups to recuperate quickly from adverse environmental effects.  As populations decline the possibility for inbreeding increases with the potential to cause genetic deficiencies in the species.

The prehensile tail of the spider monkey is muscularly adapted for controlled grasping or wrapping around branches like a third arm.  The tail of this species is one of the strongest in the animal kingdom and can support more than its entire body weight.  Their thumb less hands act as hooks for grasping and swinging agilely from branch to branch and for pulling fruit-laden branches to their mouths.

Their name originates from their extra long arms and legs that look like spiders’ legs. The females have a large pendulum like clitoris that could be mistaken for a male’s penis. This species occasionally associates in the wild with the White-throated Capuchin monkey.


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