These winged monkeys sport tawny fur coats ranging from blue-white to slate grey or even black, and some individuals have much lighter white or ivory areas around their faces and shoulders. Their wings tend to be brightly feathered. Their faces, feet, and hands are always hairless, and they groom the hair surrounding their faces outward, giving them a tattered, bearded appearance. Fire monkeys are around 18 inches long with equally long tails and a wingspan of about three feet. A few individuals have two pairs of wings; this trait grants them perfect maneuverability, but they are otherwise statistically identical to their two-winged kin.