Ralph Martin / March 2023 – vol. 116, issue 3, pp 127–142 Abstract Song is an important mechanism in reproductive isolation in birds, and geographic variation in songs can lead to the formation of pre-mating barriers and isolation between populations – the first steps in speciation. In this study, acoustic variation was analysed in the Zitting Cisticola Cisticola juncidis. Through an analysis of song from across the species’ Afric... This article is only available to registered users.To read more, please log in or purchase a subscription.