Why does the tui have a tuft?

The tui, a bird native to New Zealand, has a distinctive tuft of white throat feathers, known as a "wattle." This tuft serves multiple purposes, including attracting mates during courtship displays and signaling health and vitality. Additionally, it plays a role in communication among tui, helping them convey messages to each other through their vocalizations. Overall, the tuft enhances the tui's visual appeal and social interactions within its environment.