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For almost one hundred years, people have known the sound of a lion's roar. This loud noise opened every MGM movie. It created a strong image of a single, huge sound. Many people believed this was the only way lions spoke. However, new scientific research shows that a lion's true voice is much more complex. Scientists have found that lions use two different types of roars. This discovery changes what we know about how these big cats talk to each other.
Scientists recently studied thousands of hours of recordings made in Africa. They used special computer technology to listen to the sounds carefully. The team found a surprise. African lions make two clearly different roars. The first is the deep, loud roar that everyone knows. It has a unique sound pattern that can tell one lion apart from another, just like a human voice. The second sound was hidden before. Researchers named it the "intermediary" roar. This sound is shorter and has a lower pitch than the classic roar.
Biologists have known for a long time that a lion's roar does many jobs. It tells rivals to stay away from their land. It helps attract a mate. It also lets members of a pride find each other across the huge savanna. A full roar usually starts with soft moans. Then it moves to the main roars. Finally, it ends with short grunts. Before now, scientists thought all the sounds in the middle were just one type of roar. The new data let them split that middle sound into two parts.
This new way of sorting sounds is very important for saving lions. It can help experts train computer programs to tell one lion's voice from another. If this works, wildlife groups can count and track lions using only their sounds. This is a gentle way to study animals. It avoids the dangers of getting too close or using physical tags that might disturb them.
"The new work makes the technique easier to understand and implement by non-specialists," says Karen McComb. She is an expert in animal communication at the University of Sussex in England. She was not part of the study team. Being able to identify lions by their roars is becoming urgent. Lions have dropped by about 90 percent in their old homes because people took their land and caused fighting. Jonathan Growcott, a conservation expert at the University of Exeter, says, "Being able to identify a lion by its roar could allow you to count them." He explains that counting is the first critical step to protect them.
The study began with a huge library of sound. It included tens of thousands of hours of audio. The collection had sounds from remote cameras in Tanzania's Nyerere National Park. It also had sounds from special collars on lions in Zimbabwe. From this large group of sounds, the team picked over 3,000 calls to study closely.