Final answer:
Savanna baboons avoid predators at night by sleeping in large groups in trees or on cliffs, where they can stay safe from most nocturnal predators. They also maintain a mutual watch system with impalas during the day, although their relationship is complex due to occasional predation by baboons on impala fawns.
Step-by-step explanation:
To avoid predators at night, savanna baboons employ various strategies. These primates are adept climbers, utilizing their ability to scale trees for safety. At dusk, baboons typically retreat to trees or cliffs where they sleep in large groups for protection. Additionally, they have a mutually beneficial relationship with impalas, wherein the baboons keep watch and bark to signal an alarm at the approach of danger while they are in the trees during the day. However, male baboons may prey on young impala, demonstrating the complexity of their interactions.
Other animals, such as prairie dogs and impalas, also have their own survival mechanisms, such as living in underground burrows or using speed and agility to escape predators. Evolution has equipped each species in the savanna with different methods to maximize their survival chances against the array of predators that roam these grasslands.