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Primates Mammal Least Concern (IUCN)

Red-tailed Monkey

Cercopithecus ascanius

A small western-forest guenon with a startling white heart-shaped nose spot and a long chestnut tail.

Where to look
Mahale Mountains National Park Gombe National Park Western Tanzanian forest reserves
Best time
Year-round at Mahale, on the forest trails to the chimpanzee ranges.
Habitat
Lowland and mid-altitude evergreen forest, gallery forest, secondary growth and forest edge in the west.
All Tanzania wildlife

In the field

Photograph coming soon

We publish our own photographs rather than stock pictures, so this profile is waiting on a red-tailed monkey image from one of our guides. It will be added as soon as we have one worth showing — the field notes below are complete in the meantime.

Species profile

About the red-tailed monkey

The red-tailed monkey is one of the most charming primates of Tanzania's western forests: dark olive with white cheek whiskers, a vivid white heart-shaped patch on the nose and a long tail that turns deep chestnut towards the tip.

It is a busy, agile feeder that stores fruit in large cheek pouches to carry away from competition, and it frequently travels in mixed troops with blue monkeys and red colobus. Mahale and Gombe are the places to see it in Tanzania.

Life in the wild

Behavior & relationships

Behavior

Diurnal and arboreal, working the mid and lower canopy. Fills its cheek pouches rapidly at a fruiting tree, then withdraws to eat in cover.

Social life

Troops of roughly ten to thirty-five with one adult male; regularly forms lasting mixed troops with blue monkeys and red colobus.

What makes it remarkable

Special features

A white heart-shaped nose spot unique among African monkeys, and cheek pouches that hold as much as its stomach.

See it responsibly

Plan a Tanzania safari around the wildlife you love.

Tell our Arusha team what you hope to see. We will match the season, parks and pace to your interests.