bird song has been considered almost exclusively a male trait, but female song is present in 71% if surveyed species including 32 famoilies and you are setting out on a project to test the functional significance of female song in a species. clearly outline the hypothesis that you would construct and what kind of data you would collect to answer the significance of female song to satisfy proximate and ecological reasons as well as phylogenetic imperatives and selection pressures for the persistence of this traint in this species