Uakari: A baby uakari clings to its mother. Despite their surprising habit of emitting what sounds like hysterical laughter when annoyed, these creatures are reputed to make delightful pets when they are young- so loyal to their owners that if deserted
Gorilla and Homo Skeletons: Comparative skeletons from a macaque monkey (not pictured- on page 82), gorilla and man illustrate the physiological progression from four-footedness through arm-swinging to two-legged walking. The monkey's arms are somewhat
Male baboon: Safe from predators, a male baboon adopts the posture it may keep all night long. Its ischial callosities, or callous pads, bear its weight and permit it to sleep sitting up even on slender branches.