Bullroarers are considered secret men's business by some Aboriginal tribal groups, and hence taboo for women, children, non-initiated men and/or outsiders to even hear. They are used in men's initiation ceremonies and the sound they produced is considered by some Indigenous cultures to represent the sound of the Rainbow Serpent. In the cultures of South-East Australia, the sound of the bullroarer is the voice of Daramulan, and a successful bullroarer can only be made if it has been cut from a tree containing his spirit.
