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7 monkey species you didn’t know existed

A surprising tour through the world’s strangest, rarest, and most overlooked monkeys—from tiny thumb-sized primates to bright-faced forest dwellers.

3 min readNew DelhiJan 19, 2026 03:00 PM IST

Proboscis Monkey in Borneo (Photo: Wikipedia)

When most people think of monkeys, they picture familiar ones like macaques, langurs, and capuchins. However, the primate world is much more diverse and surprising than many realise. In remote forests, on hidden islands, and even in swampy lowlands, there are species so unusual that even wildlife fans might not know about them.

Here are 10 amazing monkey species you might not have heard of, each with unique features, interesting behaviours, and a story of its own.

1. The Pygmy Marmoset (World’s Smallest Monkey), South America

Pygmy Marmoset at Zoo Lagos, Portugal (Photo: Wikipedia/Flickr)

Weighing just 100 grams, this tiny monkey can fit in your palm. Known as the “finger monkey,” it feeds mostly on tree sap and moves like a hummingbird through the Amazon canopy.

2. The Golden Snub-Nosed Monkey, China

Golden Snub-nosed Monkeys in Qinling Mountains, China (Photo: Wikipedia)

With its blue face and golden-orange fur, this striking monkey looks almost mythical. Found in the snowy forests of China, it survives harsh winters and lives in some of the world’s largest primate groups.

3. The Bald Uakari (Red-Faced Monkey), Brazil

White-uakari (Photo: Wikipedia)

This monkey’s bright red, hairless face makes it unforgettable. The redder the face, the healthier the monkey—making it nature’s own health indicator.

4. The Proboscis Monkey, Borneo

Known for its huge, pendulum-like nose, this species is an excellent swimmer and is often found near mangroves. Males use their large noses to attract females and make loud honking calls.

5. The Roloway Monkey, West Africa

Roloway Monkey (Photo: Wikipedia)

Critically endangered, this black-and-white monkey, characterised by a distinctive white beard, is one of the rarest primates on Earth, inhabiting shrinking forests in Ghana and the Ivory Coast.

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6. The Celebes Crested Macaque, Indonesia

Rotterdam Zoo (Rotterdam) (Photo: Wikipedia)

Jet-black with a punk-style hair crest, this charismatic monkey is famous for the viral “monkey selfie” incident. It’s extremely expressive and lives only on Sulawesi.

ALSO READ | Scratching helps boost social bonding and reduce stress in monkeys

7. The Titi Monkey, South America

Dusky Titi Monkey (Photo: Wikipedia)

These fluffy monkeys are known for their adorable habit: they mate for life and hold each other’s tails while sleeping—one of the most affectionate primates in the world.

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