Benjamin Miller describes this story in the following way: 'a creation story about a Water Spirit who desires to enter the material world. A Lyre Bird, who is adept at singing the songs of other animals, is asked by a spirit to sing into a stream. After much beautiful singing a Being emerges from the water. The Lyre Bird names the Being "Gool lun naga, a son of the clear running stream of water"'.
Source: Benjamin Miller, 'David Unaipon's Style of Subversion: Performativity and Becoming in "Gool Lun Naga (Green Frog)"', JASAL Special Issue (2008):84.