Howler Monkeys and Spider Monkeys: Atelidae

The atelids (members of the Atelidae family) are the largest New World primates. They range in color from yellowish beige to dark red to black. Males and females of some howler species differ in color. Many spider monkeys have light-colored masks around their eyes. Howler and woolly monkeys have stocky bodies and shorter limbs, while spider monkeys and muriquis have slimmer bodies and long tails. All tails are prehensile, capable of grasping tree branches, so that the monkeys usually feed while suspended.