Ateles marginatus; Print; The white-cheeked spider monkey (Ateles marginatus) is a species of spider monkey; a type of New World monkey; endemic to Brazil. It moves around the forest canopy in small family groups of two to four; part of larger groups of a few dozen animals. This monkey feeds on leaves; flowers; fruits; bark; honey and small insects; and it is an important means of seed dispersal for forest trees. Females give birth after a 230-day gestation period. The population of this monkey is decreasing as its forest habitat is lost to soybean production; deforestation and road construction. It is also regarded as a delicacy and hunted for food. For these reasons; the International Union for Conservation of Nature has assessed the animal's conservation status as being "endangered".; 1809