Black-headed spider monkey

The black-headed spider monkey (Ateles fusciceps) is a species of spider monkey from Central and South America, specifically Colombia, Ecuador and Panama. Some primatologists treat it as a separate species, while other authors treat it as a subspecies of Geoffroy's spider monkey. It lives in tropical and subtropical humid forests between 100 and 1,700 metres above sea level, at about 1.2 monkeys per square kilometre, while the subspecies rufiventris also lives in dry forests and cloud forests up to about 2,500 metres. Head and body length typically ranges from 39.3 to 53.8 cm, and males weigh 8.89 kg on average and females 8.8 kg. It is arboreal and diurnal and primarily frugivorous, with fruit about 80 percent of the diet. The IUCN considers it endangered because of an estimated population loss of more than 50 percent over 45 years from hunting and human encroachment.