Head to head
Monkey vs Baboon
Baboon and monkey are sometimes used as if they were opposites, but a baboon is simply one particular kind of monkey, a large terrestrial one. The real question is what sets a baboon apart from the smaller, often tree-dwelling monkeys most people picture.
| Monkey | Baboon | |
|---|---|---|
| Classification | A specific genus of large monkey (Papio) | A broad group of 260+ species |
| Face | Long, dog-like muzzle | Usually flatter and more rounded |
| Size | Large; males to ~40 kg | Mostly small to medium |
| Habitat | Almost entirely on the ground | Often mainly in trees |
| Tail | Non-grasping, held in a kinked arch | Non-grasping, or prehensile in some New World species |
| Range | Africa and Arabia only | Africa, Asia, and the Americas |
| Group size | Up to 150 in one troop | Usually smaller groups |
| Diet | Extreme omnivore, including small animals | Mostly fruit, leaves, and insects |
Monkey vs Baboon: common questions
Is a baboon technically a monkey?
Yes, without exception. A baboon is a member of the genus Papio, which sits within the Old World monkeys, the same broad group as macaques, mangabeys, and the mandrill, and it has every defining monkey feature, including a tail, even if held in an unusual arch rather than up or wrapped, and a body built for quadrupedal walking, with no membership in the ape branch of the primate tree, which lacks a tail entirely. Calling a baboon a monkey is always correct. The confusion runs the other way, since people sometimes assume a baboon is too big or too dog-faced to be a monkey, when size and face shape are just variation within the monkey group, not a break from it.
Why does a baboon look more like a dog than other monkeys?
Its face and gait have converged on solutions similar to a dog's for a similar lifestyle. Baboons forage on open ground over long distances, often over rough terrain and near predators, and a long snout houses a bigger nasal cavity and stronger jaw muscles for processing tough food and defending against predators with large canine teeth, while a body built for sustained quadrupedal walking, rather than for leaping and climbing, gives a somewhat dog-like posture and gait. Tree-dwelling monkeys, which move by leaping and climbing and eat softer foods like fruit, keep the flatter face and lighter build typical of most monkeys. It is convergent evolution, not any close relationship to dogs.
Which is bigger, a monkey or a baboon?
A baboon is bigger than the great majority of monkeys, though not the biggest monkey overall. A large male chacma or olive baboon can weigh 30 to 40 kilograms, heavier than most other monkeys by a wide margin, and only a handful of monkeys, chiefly the mandrill, approach or exceed that size, with a big male mandrill able to outweigh a baboon. Most monkeys, especially the many small New World species like marmosets, tamarins, and squirrel monkeys, weigh under a couple of kilograms. So while baboon is not a synonym for the largest monkey, it is safely near the top of the monkey size range.