Why do willy-wag-tails wag their tails?

Willy-wag-tails, also known as fantails, wag their tails as a form of communication and expression. This distinctive tail movement helps to alert other birds to their presence, signal their mood, and enhance their courtship displays. The tail wagging also aids in their hunting strategy, as it can help flush out insects and other prey from hiding. Overall, tail wagging is an integral part of their behavior and social interactions.