1. Male geladas’ outsize canines aren’t used for hunting. Instead they’re used when fighting, threatening other males, or defending themselves against predators.
2. A gelada leaps over a small runoff stream as an infant (obscured except for its tail) clings to her back.
3. A shaggy male gelada pauses during his morning ascent from a cliff above East Africa’s Great Rift Valley.
4. A young monkey may hitch rides on its mother’s back, hide behind her and play peekaboo with other primates, or find refuge beneath her chest.