Baboons and Monkeys: Behaviour to Watch

Big cats and elephants get the headlines, but Africa's primates reward the patient watcher with some of the richest behaviour on any game drive. A baboon troop is a soap opera of alliances and rivalries; a band of vervets runs an alarm system precise enough to name the predator; a colobus drifts through the canopy like a black-and-white banner. Because primates are social, intelligent and active by day, you can actually follow what they are doing — who grooms whom, who defers to whom, which youngster is testing the rules. That makes them a masterclass in reading animal society. They also live close to us, which brings both delight and friction. Baboons in particular have learned that people mean food, and a relaxed lunch stop can turn into a raid in seconds. Knowing how these animals think keeps your sandwich, and their wild manners, intact.

Key things to know

• ➜ Baboon troops run on a clear dominance hierarchy, with females forming the stable core and males coming and going.
• ➜ Grooming is social currency — it cements alliances and calms tension as much as it removes parasites.
• ➜ Vervet monkeys give distinct alarm calls for leopard, eagle and snake, and troop-mates respond differently to each.
• ➜ Colobus monkeys are leaf-eaters of the forest canopy, rarely coming to the ground, and are a highland-forest highlight.
• ➜ Never feed monkeys or baboons; food-conditioned primates become bold, destructive and are often killed as a result.
• ➜ Keep tent zips closed and vehicle windows up where troops are habituated, especially at picnic sites.
• ➜ A yawning male baboon is displaying his canines as a threat, not showing you he is sleepy.

Inside a baboon troop

A baboon troop can number from a dozen to well over a hundred, and its politics are endlessly watchable. Females stay in the troop for life and inherit rank from their mothers, so the female hierarchy is stable and forms the troop's backbone. Males, by contrast, leave their birth troop as they mature and must work their way up through bluff, fighting and alliance, which is why male rank shifts far more often. Watch for a few minutes and you will see the currency of this society: supplants at a feeding spot, presentation of the rump in appeasement, and the constant low-level negotiation of who sits where.

Communication is rich and readable. A raised tail, a 'fear grin' with lips pulled back, and rapid glances all signal social stress; relaxed lip-smacking is friendly. The most misread signal is the wide yawn of an adult male: far from sleepiness, it flashes his long canines and is pure intimidation. Youngsters, meanwhile, spend the day play-fighting and testing boundaries, learning the rules that will govern their adult lives.

• ➜ Females: lifelong troop members, inherited rank, stable core
• ➜ Males: immigrate at maturity, rank won by contest and alliance
• ➜ Lip-smacking: friendly, reassuring
• ➜ Fear grin and raised tail: nervousness or submission
• ➜ Wide yawn by a male: canine display, a threat

Vervets, and the language of alarm

Vervet monkeys are the wiry grey primates you meet at forest edges and lodge gardens, and they are famous in science for their alarm calls. They give acoustically distinct warnings for different predators, and the troop reacts appropriately to each: one call sends them up into the trees (leopard), another makes them look up and dive for cover (eagle), and another has them stand and scan the grass (snake). It is one of the clearest examples of near-referential communication in a wild mammal.

On safari this makes vervets excellent sentinels. If a troop erupts and bolts into the canopy, scan the ground for a cat; if they crane upward, check the sky for a raptor. The same intelligence that makes them fascinating also makes them accomplished thieves around lodges, so admire them at a distance and never leave food unattended.

Colobus, and other canopy specialists

High in the montane and coastal forests of East Africa lives the black-and-white colobus, one of the continent's most beautiful primates, with a flowing white mantle and a plumed tail. Colobus are leaf specialists with a chambered, ruminant-like stomach that ferments tough foliage, so they move slowly, rest often and rarely descend to the ground. Look for them in places like Kakamega, the Aberdares, Nyungwe and the forests around Kilimanjaro, usually as a troop lounging in the high canopy at midday.

Other forest primates reward a slower, quieter safari. Blue and Sykes' monkeys work the mid-canopy, mangabeys and guenons add variety in West and Central African forests, and in Rwanda and Uganda the great apes — mountain gorillas and chimpanzees — turn a forest walk into a once-in-a-lifetime encounter. These species ask for a different rhythm from the open-plains game drive: eyes up, ears open, and plenty of patience.

When primates and people collide

Primates that live near people quickly learn that humans equal calories, and this is where trouble starts. Baboons are strong, clever and fearless once habituated; a big male can open a cool-box, unzip a tent or snatch food from a hand, and a raided camp teaches the whole troop to come back. Vervets are nimbler but just as persistent around breakfast tables. The animals are not being malicious — they are being smart — but a food-conditioned primate is a doomed one, because bold raiders are frequently trapped or shot.

The fix is entirely on us. Never feed them, even for a photo. Keep food sealed and out of sight, close tent and vehicle zips and windows in troop territory, and do not leave a picnic unguarded. If a baboon approaches confidently, stand tall, look assertive and back your guide's lead; do not scream, run or turn your back on a large male. Respect their space and they remain one of the great free shows of an African day.

• ➜ Never hand-feed or toss food to primates
• ➜ Store food in sealed containers, out of sight
• ➜ Zip tents fully; keep vehicle windows up at raid-prone stops
• ➜ Do not leave picnics or daypacks unattended
• ➜ Face a bold baboon confidently — never scream, run, or corner it

Watching primates well: where, when and how

Primates reward patience more than almost any other safari sighting. The best watching often comes not from a quick roadside stop but from sitting quietly with a troop for twenty minutes, letting the social drama unfold — the grooming lines, the play-fights of youngsters, the subtle glances that keep the group's peace. Riverine forest, rocky kopjes and lodge margins at first light or late afternoon are reliable places to find them active, when the animals feed and socialise before the heat.

Approach on foot only with a guide, keep your voice low and never offer food, and let the troop set the distance. A good guide will read the group's mood and position the vehicle so you see natural behaviour rather than nervous flight. For photographers, primates are a gift: expressive faces, complex interactions and constant movement, best captured with a longer lens and a little patience for the moment when an animal looks straight down the barrel.

• ➜ Riverine forest, kopjes and lodge margins are reliable primate spots
• ➜ Early morning and late afternoon are the most active feeding times
• ➜ Sit quietly with a troop rather than making brief stops
• ➜ Never offer food; let the animals set the distance
• ➜ A longer lens and patience reward you with expressive portraits

References & further reading

1. Sinclair, A. R. E., et al. (Eds.) (2015). Serengeti IV. Chicago: University of Chicago Press.
2. Estes, R. D. (2012). The Behavior Guide to African Mammals. Berkeley: University of California Press.
3. Kingdon, J. (2015). The Kingdon Field Guide to African Mammals (2nd ed.). London: Bloomsbury.
4. IUCN (2024). The IUCN Red List of Threatened Species, Version 2024-1. www.iucnredlist.org.