The African lion (Panthera leo) holds the title for the land animal with the loudest roar. Lions are known for their powerful and distinctive roar, which can be heard from up to 8 kilometers (5 miles) away. This vocalization is a key part of their communication, used to mark territory and intimidate rivals. The roar of a lion can reach sound levels of around 114 decibels, making it one of the most potent and resonant sounds in the animal kingdom.