The patas monkey is one of Africa's most distinctive savannah primates — a long-legged, reddish-coated monkey whose explosive ground speed has earned it the title of the fastest primate on earth. Unlike the forest guenons and colobus monkeys that dominate western Uganda's montane circuits, Erythrocebus patas is a creature of open acacia grassland, termite-mound lookouts, and wide horizons. In Uganda, this rare northern specialist occurs in Kidepo Valley National Park and the northern sector of Murchison Falls National Park — making it an essential target for travellers building a complete primate checklist beyond Bwindi and Kibale.
Scientifically, the patas monkey occupies its own genus, Erythrocebus, having been separated from the broader guenon group (Cercopithecus) on the strength of its terrestrial ecology, morphology, and behaviour. Males wear a striking red coat with a white moustache and beard; females are slightly duller but equally long-limbed. Watch a guard male perched on a termite mound, scanning for leopard while females graze below, and the species' savannah adaptation becomes immediately clear — this is a primate built for the same open plains where lion, cheetah, and Uganda kob roam.
What Is a Patas Monkey?
The patas monkey belongs to the family Cercopithecidae — the Old World monkeys — and is the sole living species in genus Erythrocebus. European naturalists described it from West African specimens in the eighteenth century; today its range stretches in a band across sub-Saharan Africa from Senegal eastward through the Sahel and into East Africa.
- Kingdom: Animalia
- Phylum: Chordata
- Class: Mammalia
- Order: Primates
- Family: Cercopithecidae
- Genus: Erythrocebus
- Species: Erythrocebus patas
East African populations, including those in Uganda, are often assigned to the red patas subspecies E. p. pyrrhonotus, distinguished by richer reddish pelage compared with the greyer West African form. Whatever the subspecific label, Uganda's patas share the same ground-dwelling lifestyle that sets them apart from every other primate in the country's protected areas.
Physical Characteristics
Build and Locomotion
Patas monkeys are among the most terrestrial of all primates. Adults stand roughly 75 to 90 centimetres in total length (head and body), with males weighing between about 7 and 13 kilograms and females somewhat lighter. The limbs are exceptionally long relative to the trunk — an adaptation for quadrupedal running on open ground rather than arboreal leaping. Hind limbs are especially powerful, driving the sprint that can exceed 50 kilometres per hour over short distances.
Coat and Markings
Males display a vivid reddish-brown coat on the back and crown, with paler underparts and distinctive white facial hair forming a moustache and beard. A dark line runs across the brow, and the tail is long and straight — often held horizontal during movement. Females are slightly smaller and less intensely coloured but share the same lean, athletic silhouette. At distance on a game drive, patas can be mistaken for a small antelope until the tail and head profile resolve into a primate.
Sexual Dimorphism
Males are noticeably larger and more vividly coloured than females. Adult males also carry larger canine teeth and play the dominant role in territorial defence and predator surveillance. During the breeding season, male competition for access to female troops intensifies, though patas social structure is less rigidly hierarchical than baboon societies.
Africa's Fastest Primate
The patas monkey's ground speed is its defining trait. Laboratory and field observations have recorded sprint speeds approaching 55 kilometres per hour — faster than any other primate and comparable to Thomson's gazelle over short distances. This speed is not a curiosity; it is a survival strategy on open savannah where cover is scarce and predators detect movement from hundreds of metres away. When a guard male sounds the alarm, the entire troop can vanish across the plain in seconds.
Where Patas Monkeys Live in Uganda
Within Uganda, patas monkeys are restricted to northern savannah ecosystems. Kidepo Valley National Park is the premier destination — troops regularly appear on Narus Valley game drives alongside buffalo, elephant, Jackson's hartebeest, and lion. Murchison Falls National Park supports a secondary population on the northern bank north of the Nile, where Borassus palm grasslands and acacia plains offer similar open-country habitat.
They do not occur in western forest parks, Lake Mburo, Queen Elizabeth, or the Albertine Rift montane reserves. For primate enthusiasts who have already trekked gorillas and chimps, adding a northern savannah circuit specifically for patas delivers a genuinely different primate experience — ground-level, open-country, and built around game-drive pacing rather than forest trails.
Habitat and Ecosystem
Patas monkeys inhabit dry acacia savannah, open bush, and lightly wooded grassland — always favouring landscapes with good visibility and scattered termite mounds for elevated surveillance. They avoid dense forest and are rarely found far from water in the driest months. Kidepo's Narus Valley and Murchison's northern plains are textbook patas country. Explore our habitat guide for vegetation detail and seasonal movement.
Social Structure
Patas troops are typically multi-female groups with a single resident male — the guard male — who watches for predators from a termite mound or low rise while females and juveniles forage on the ground. Troop sizes range from a dozen to fifty or more individuals. Bachelor males may form separate groups or remain on the periphery. This social system is finely tuned to open-country living where early predator detection matters more than tree refuge.
Diet
Patas monkeys are omnivorous ground foragers. They eat grasses, seeds, gum, flowers, and seasonal fruits, supplemented by insects, spiders, and other small invertebrates. Unlike strict browsers or frugivores, patas exploit the full savannah floor — a flexibility that keeps troops feeding productively through wet and dry seasons. Read more on our diet page.
Behaviour
Diurnal and intensely vigilant, patas monkeys spend the bulk of daylight hours foraging on the ground, retreating to low trees or bush only to sleep. The guard male's watchfulness is the troop's first line of defence; sharp alarm calls trigger coordinated sprints that are among the most dramatic primate behaviours visible on a Uganda game drive. See our behaviour guide for troop dynamics, alarm signals, and breeding displays.
Predators and Ecological Role
Leopard, lion, cheetah where present, spotted hyena, and large raptors prey on patas monkeys. In Kidepo, leopard and lion are the most significant threats; patas speed and vigilance are their primary defences. As seed dispersers and insect predators, patas also play a modest but real role in savannah food webs — though their greatest ecological significance may be as indicators of intact open grassland habitat.
Conservation Status
Globally, the IUCN classifies patas monkeys as Least Concern, with a wide African range. Populations are declining in areas of agricultural expansion and habitat fragmentation, however, and Uganda's animals are locally rare and geographically restricted. Protecting Kidepo and Murchison savannah is essential. Details on our conservation page.
Best Time to See Patas Monkeys
Patas monkeys are visible year-round in northern parks. Dry seasons — roughly June to September and December to February — generally offer the easiest game drives on firm tracks and shorter grass that improves visibility. Dawn and early morning produce the most active foraging and guard-male displays. See best time to see patas monkeys for monthly notes.
Safari Experiences
Kidepo and Murchison northern circuits suit multi-day savannah expeditions, fly-in remote safaris, and Big Five combinations. Patas monkeys reward patient dawn drives and sharp-eyed guides rather than dedicated trekking permits. Browse patas monkey safari experiences and Uganda safari packages for routed itineraries.
Quick Facts
| Uganda strongholds | Kidepo Valley and Murchison northern sector |
|---|---|
| Scientific name | Erythrocebus patas |
| IUCN | Least Concern globally; locally rare in Uganda |
