Similar to why teenage boys start garage bands, it appears that palm cockatoo males likely drum to attract females. The drumming palm cockatoos in the Cape York peninsula have their own cadences. It appears that drumming may be a cultural behavior endemic to Australia as palm cockatoos in New Guinea and Indonesia do not drum (or at least have not been observed doing it).
Has anybody here seen wild palm cockatoos?
Drumming Cockatoos and the Rhythms of Love
Has anybody here seen wild palm cockatoos?
Drumming Cockatoos and the Rhythms of Love