The pygostyle is an amazing evolutionary adaptation. The fusion of several vertebrae allows for some amazing tail fans, allowing birds to perform incredible displays in mating displays. One group that exemplifies this are fantails, named for their large tail feathers, allowing the males to display elegantly to females. One such example is the Grey fantail (Rhipidura albiscapa), a small insectivore from Australia, along with the Solomon islands, New Caledonia and Vanuatu.
