In mythology of many of the Australian Aboriginal peoples native to Victoria, Australia, Birrahgnooloo is the fertility goddess and wife of Baiame; in some traditions Baiame has a second wife, Cunnunbeillee. Birrahgnooloo is said to be an emu, although she takes the role of a human in many myths. She is often identified as the mother of Daramulum. She is said to be able to send floods if one knows how to ask correctly.
Birrahgnooloo is often written as 'Birran-gnulu'.