Napo Saki

• Common Name: Napo Saki
• Taxonomy Classification Year: 1938
• Monkey Size: 20 to 50 cm (8 to 20 in)
• Skin Color(s): Black or gray
• Habitat: Forest, rainforest
• Diet: Omnivorous
• Native Countries: Ecuador, Peru

The Napo saki^[1] (Pithecia napensis), also called the Napo monk saki, is a species of saki monkey, a type of New World Monkey.

• Its range includes parts of northern Peru and eastern Ecuador. Napo-Sakis show slight sexual dimorphism.
• Male species have a black body, a dense coat of short white hairs on the crown, and a gray facial disc.
• They also sport a reddish or orange ruff on their chest. Female species are gray overall, with no facial disc or crown coloration.
• Their frill is brown and more subtle than that of the male species. Napo-sakis have particularly long hair around their faces and necks.
• Their tails are also covered in long hair, giving them a very bushy appearance.

• The species’ common name is derived from the Napo River in its locality.
• Napo-Sakis have several physiological adaptations that help them survive high up in the rainforest.
• They may exhibit piloerection to appear larger than they are, which can be helpful in territorial disputes or defense against predators.
• Their forward-facing eyes allow them to see stereoscopically, a lifelong necessity in the trees.
• A strictly arboreal species, Napo-saki sometimes descends to the lower levels of trees but rarely descends to the ground.