The black-headed spider monkey[1] is a species of New-World monkey native to Central and South America.
- They have long, spindly limbs and a prehensile tail used as a 5th limb for swinging between branches while foraging for food.
- The tail is much longer than his body. The tail measures from 28 to 34 in (70 to 85 cm), while the body varies from 16 to 22 in (40 to 55 cm).
- Their fur is shaggy and long, typically with a lighter underside. Each eye of Ateles fusciceps is surrounded by a white ring.
- Their skull is structured to have forward-facing eyes that allow them to accurately measure distances as they swing from one tree to another.
- Black-headed spider monkey species do not have a thumb, which increases their grip strength and helps them climb.