Where Birdsong Began

Are our birds home-grown Aussies, or did their ancestors move here from somewhere else?
New genetic and fossil evidence reveals that the majority of the worlds birds have Australian ancestors. The discovery is a scientific revolution that turned the bird world on its head. Mark Horstman sees our songbirds, parrots and pigeons in a new light as he discovers that no other continent has been as important for bird evolution. In fact, Australia is where song began. #ABCcatalyst