Douroucouli/Night Monkey - Grey-necked Aotus species

The Douroucoulis, also called Night Monkeys and Owl Monkeys, as the name indicates, are active mainly at night. They are small monkeys native to jungles/forests of Central and South America.

Spix's Night Monkey
Spix's Night Monkey
The several species of Night Monkey are divided into two groups, the grey-necked or northern, on this page page, with off-white or grey chest fur, and the red-necked/southern (link below). Spix's Night Monkey, Aotus vociferans, (shown above and immdiately below) is in the grey-necked group.
Spix's Night Monkey
Spix's Night Monkey
Spix's Night Monkey
Spix's is native to southern Colombia, eastern Ecuador, part of far northern Peru and northwestern Brazil.
  
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Grey-handed Night Monkey
Grey-handed Night Monkey
Grey-handed Night Monkey
The Grey-handed Night Monkey, Aotus griseimembra, is native to parts of northern Colombia and western Venezuela. Populations are vulnerable through habitat loss and (previous) capture for medical research.
  
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