Coquerel’s Sifaka

sifaka

The sifaka is a large lemur built for a specialized type of locomotion called vertical clinging and leaping. Maintaining an upright posture, it uses its powerful legs to jump from tree to tree. Active by day, the sifaka sleeps in small groups high up in the treetops to avoid predators at night.

Pygmy Slow Loris

slow loris

The solitary, female loris usually bears one young at a time. The infant clings to its mother’s belly for a few days. Soon, the mother will leave the young one behind, a behavior called “parking,” as she heads out at night to forage. The young loris relies on camouflage and toxic secretions as defense against predators.

Aye-aye

aye-aye

Like a woodpecker, the aye-aye is a percussion forager. Tapping on a dead log with its especially long and thin middle finger, the aye-aye listens closely for signs of insect larva inside. It chisels a hole in the wood with its ever-growing incisors and extracts the larva with its finger.

White-Handed Gibbon

white handed gibbon

Like other gibbons, the white-handed gibbon is an expert at traveling in the trees. Arms that are longer than its legs allow the gibbon to cover a great distance—nearly 10 feet—with each pendulum swing of its body. Forward-facing eyes provide it with the binocular vision and depth perception necessary to determine a safe route.

Sumatran Orangutan

Sumatran orangutan

Orangutan means “person of the forest” and is a fitting name for a primate that is happy to spend its day hanging out in the treetops. The only truly arboreal ape, the orangutan is also the largest tree-dwelling animal.

 

Siamang

simang

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Gibbons are known for their vocal abilities. Male and female pairs duet to strengthen their bond and defend their territory. The largest of all gibbons, the siamang is also the loudest as its musical calls can be heard through dense rainforest foliage up to two miles away.

Ring-tailed Lemur

ring tailed lemur

Ring-tailed lemurs live in social troops of a dozen or so, led by a single, dominant female. Lemurs have pungent scent glands they use for communication and even battle. Male ring-tailed lemurs compete for mates by smearing scents from forearm glands onto the tips of their tails.

 

Potto

potto

Primates are generally categorized into three groupings—monkeys, apes, and prosimians. Typically thought to be more primitive than other primates, prosimians tend to be small and nocturnal. The big-eyed potto certainly fits the bill.

 

Mueller’s Gibbon

muellers gibbon

Mueller’s gibbons feast on scattered patches of ripe fruit. Traveling over half a mile a day, they help regenerate the forest as they disperse seeds they have eaten. Unfortunately, this natural process of growth cannot keep up with the rate at which the gibbon’s forests are being destroyed.

Lion-tailed Macaque

Lion-tailed Macaque

Unlike other macaques that live around towns, lion-tailed macaques are shy and do not leave the forest even to cross farms. The spread of teak, coffee and tea plantations not only reduces the amount of forest, it separates macaque groups and makes it more difficult to find mates.