Brown spider monkeys have long and thin limbs with their forelimbs being longer than their hind limbs.
They also have a distinctive 75 cm (30 in) long flexible, thin and prehensile tail which at times acts like a fifth limb.
The tail has a highly flexible, hairless tip with skin grooves which improves grip.
Their hands look slightly curvy and they have small thumbs.
All these features make it possible for them to climb trees at high elevations, hang and swing from one tree to another without often having to lower themselves to the ground.
Adult males weigh between 7.9 and 9.1 kg (17 and 20 lb) and adult females weigh between 7.5 and 9 kg (17 and 20 lb).
Their average adult body length is about 50 cm (20 in).
Their coloration ranges from light brown to dark on upper parts including the head.
Their most distinctive characteristic is a whitish triangular forehead patch, although not all spider monkeys have one.
Some few individuals have pale blue eyes.
Brown spider monkeys have long and thin limbs with their forelimbs being longer than their hind limbs. They also have a distinctive 75 cm (30 in) long flexible, thin and prehensile tail which at times acts like a fifth limb. The tail has a highly flexible, hairless tip with skin grooves which improves grip. Their hands look slightly curvy and they have small thumbs. All these features make it possible for them to climb trees at high elevations, hang and swing from one tree to another without often having to lower themselves to the ground. Adult males weigh between 7.9 and 9.1 kg (17 and 20 lb) and adult females weigh between 7.5 and 9 kg (17 and 20 lb). Their average adult body length is about 50 cm (20 in). Their coloration ranges from light brown to dark on upper parts including the head. Their most distinctive characteristic is a whitish triangular forehead patch, although not all spider monkeys have one. Some few individuals have pale blue eyes.
Brown spider monkey