My work uses behavioral training and testing of auditory perceptual skills to study song perception and to test the role of vocal learning in the development of auditory perception. A current project is focused on sex differences in perceptual skills in adults. Males learn song as juveniles and produce song as adults, during courtship. Females do not learn to sing but do use their auditory perceptual skills to evaluate males' songs and choose a mate. Both sexes recognize the unique songs of individual males in social interactions. The goal of this project is to understand how sex differences in the behaviors that depend on hearing result in sex differences in auditory recognition and discrimination of the acoustic cues in song.