Bila is the personification of the sun among the Adnyamathanha people. She is a solar goddess, as befitting the general trends among Australian aboriginal peoples, which largely perceive the sun as female.
Bila is said to be a cannibal, roasting her victims over a fire, the origin of sunlight. In a myth the Lizard Man was appalled by these acts and attacked, prompting her to flee and cast the world in darkness. He then used a boomerang, catching her and making her move in a slow arc across the sky as it returned, this illuminating the world. For this act of heroism lizards like goannas and geckos are respected by the Adnyamathanha.
References
Bila (sun) Wikipedia(Text) CC BY-SA