FaunaHub

Saki Monkey (Pithecia pithecia)

MammalPrimateAmazon

Male white-faced saki (Pithecia pithecia), a black monkey with a pale facial disc.

White-faced saki (Pithecia pithecia), male.

Image: H. Zell, CC BY-SA 3.0, via Wikimedia Commons.

Overview

Saki monkeys (genus Pithecia) are shaggy-coated, long-tailed monkeys of the South American rainforest, related to uakaris and titis. The white-faced saki (Pithecia pithecia), shown here, is a well-known species in which the sexes look remarkably different: males are black with a striking pale, almost mask-like face, while females are a more uniform brownish-grey. Their thick fur and bushy, non-prehensile tail give sakis a distinctive, slightly wild appearance.

Sakis are sometimes called “flying monkeys” for their spectacular leaping ability, bounding huge distances between trees through the forest.

Note: there are several saki species; details here use the white-faced saki as a reference. Treat general statements as approximate and verify against authoritative sources.

Habitat & Range

Saki monkeys live in the forests of northern and central South America, including the Amazon basin and the Guianas, in rainforest, gallery forest, and savanna woodland depending on the species. The white-faced saki favours the lower and middle levels of the forest, where it can leap among dense branches.

Diet

Sakis are primarily seed predators and fruit-eaters: they specialise in seeds, including those inside hard, unripe fruit that they open with strong teeth, and they also eat ripe fruit, flowers, leaves, and some insects and small prey. This seed-focused diet, shared with their uakari relatives, lets them exploit foods many other monkeys cannot.

Behavior

Saki monkeys are agile, fast-moving, and famous leapers, springing long distances between trunks and branches — the reason for the “flying monkey” nickname. White-faced sakis usually live in small family groups and are generally shy and quiet, slipping away through the canopy when disturbed. The marked difference in appearance between males and females (sexual dichromatism) is one of their most notable traits.

Human Interaction & Conservation

Saki monkeys are appealing, agile rainforest animals and are sometimes seen in zoos, but in the wild they depend on intact forest and can be affected by deforestation, fragmentation, and hunting or the pet trade in some areas. Many remain reasonably widespread, while some species are of greater concern. Consult authoritative sources for species-specific status.

More photos of the saki monkey

A female white-faced saki, which is brownish-grey unlike the black male.

White-faced saki (Pithecia pithecia), female.

Image: Jim Capaldi, CC BY 2.0, via Wikimedia Commons.

Frequently Asked Questions — Saki Monkey

Why are saki monkeys called 'flying monkeys'?
Because of their leaping. Sakis are exceptional jumpers, able to launch themselves long distances between trees and branches in a single bound, seeming almost to fly through the forest. This agility helps them travel and escape danger in the dense canopy.
Why do male and female white-faced sakis look so different?
The white-faced saki shows strong sexual dichromatism: males are black with a pale, mask-like face, while females are brownish-grey with a plainer face. This difference likely helps with recognition and mate choice. It's striking enough that males and females were once mistaken for different species.
What do saki monkeys eat?
Sakis are mainly seed predators and fruit-eaters. They use strong teeth to open hard, unripe fruit and eat the seeds inside, along with ripe fruit, flowers, leaves, and some insects or small prey. This seed-focused diet, like that of uakaris, lets them use foods other monkeys can't.
Do sakis have prehensile tails?
No. Despite their long, bushy tails, saki monkeys do not have prehensile (grasping) tails like some other New World monkeys. Their tails aid balance during their dramatic leaps and climbing rather than gripping branches.

Sources and further reading

Authoritative wildlife references used for general educational context. Conservation status should always be verified against current IUCN Red List data. External links open in a new tab.