Blue Whale - The blue whale is the loudest animal on Earth, producing sounds that can reach 188 decibels. Their vocalizations can travel over 500 miles underwater.
Lion - The lion is the second loudest animal, producing a roar that can be heard up to 5 miles away.
Howler Monkey - Howler monkeys are known for their loud, guttural calls that can be heard over 3 miles away.
African Elephant - African elephants can produce sounds that are too low for humans to hear, but their calls can be felt through the ground and can travel over several miles.
Sperm Whale - Sperm whales produce a clicking sound that can reach up to 230 decibels, making it one of the loudest sounds in the animal kingdom.
Hippopotamus - The hippopotamus produces a vocalization that sounds like a loud grunt and can be heard up to 2 miles away.
Wolf - Wolves are known for their howl, which can be heard up to 6 miles away in open terrain.
Bald Eagle - The bald eagle has a loud, piercing cry that can be heard over long distances.
American Alligator - American alligators produce a deep bellowing sound that can be heard up to half a mile away.
Northern Elephant Seal - Male northern elephant seals produce a loud roar that can be heard up to 10 miles away.