What does a velar vocal fold do in a koala?

In koalas, the velar vocal folds play a crucial role in the production of their distinctive vocalizations, particularly during mating calls and communication between individuals. These specialized vocal folds allow koalas to create low-frequency sounds, which can travel long distances through their forest habitat. This vocalization is essential for attracting mates and establishing territory among male koalas. Additionally, it contributes to their social interactions within groups.