There are five different species of baboons, and all of them live in Africa or Arabia. Baboons are some of the world's largest monkeys, and males of different species average from 33 to 82 pounds. Baboon bodies are 20 to 40 inches long, not including substantial tails of varying lengths. Baboons generally prefer savanna and other semi-arid habitats, though a few live in tropical forests. Baboons do not have prehensile (gripping) tails, but they can and do climb trees to sleep, eat, or look out for trouble. They spend much of their time on the ground.