In the African savanna, lions are at the top of the food chain. Hunting in groups with their sharp claws and excellent vision, lions are considered the top land predator. Both herbivores and carnivores alike in this region know to be afraid of the lions. However, there is one super predator that these animals fear even more than lions. Humans.
Research done near waterholes used speakers to play sounds for the animals drinking there. The sounds included noises of lions and noises of humans. Animals abandoned the waterholes faster when they heard noises of humans over noises of lions. This research was published in the Current Biology under the title