5. An adult male gelada, always vigilant, keeps an eye out for threats as the sun sets on another day on the Guassa plateau.
6. Small farms hug the slopes of the Great Rift Valley and cover much of the Ethiopian Highlands, fragmenting geladas’ native grasslands.
7. Two adult males look out over a landscape in transition.
8. When it’s time to give birth, Guassa’s normally highly social geladas often isolate themselves to avoid aggressive behavior from other monkeys and remain silent in an effort to evade predators.