The white-bellied spider monkey (Ateles belzebuth) is an endangered species, featuring a brown body with light-colored belly and a whitish mark on the forehead. The species is found in northern Brazil, Colombia, Ecuador, Peru and Venezuela. The red-faced black spider monkey (Ateles paniscus) has a reddish face and long black body hair. It is native to northern Brazil, Guyana and Suriname.
The black-headed spider monkey (Ateles fusciceps) has two subspecies: Ateles fusciceps fusciceps, which is endemic to Ecuador, and Ateles fusciceps rufiventris, found mainly in Colombia and Panama. Both subspecies have predominately black bodies and faces, and are critically endangered, due to hunting and habitat loss. The white-cheeked spider monkey (Ateles marginatus) has a black body and whitish markings on its face. It is endemic to Brazil and also endangered.
Also known as black-handed spider monkey, Geoffroy's spider monkey (Ateles geoffroyi) is mainly found in Central America. It is the largest spider monkey species, with adults weighing up to 20 lbs. Although color varies according to subspecies, all Geoffroy's spider monkeys show paler color variations on their faces, which sometimes resembles a mask. Seven subspecies of Geoffroy's spider monkey are recognized, according to the IUCN Red List of Endangered Species. Despite its name, the Peruvian or black-faced spider monkey (Ateles chamek), is an endangered species also found in northwestern Brazil and Bolivia.
The brown or variegated spider monkey (Ateles hybridus) is critically endangered, because its population numbers have declined by at least 80 percent in the past 45 years. This species features brown long hair, with light-brown patterns on the face and belly. Ateles hybridus brunneus and Ateles hybridus hybridus are the two subspecies, native to Colombia and Venezuela.