Publisher Summary This chapter outlines the evolution of geographic variation in birdsong.
Studies of vocal signals in birds offer potentially useful opportunities for empirical tests of the …

Molecular studies of speciation in birds over the last three decades have been dominated by
a focus on the geography, ecology, and timing of speciation, a tradition traceable to Mayr's …

Even before the publication of Darwin's Origin of Species, the perception of evolutionary
change has been a tree-like pattern of diversification-with divergent branches spreading …

Given that evolutionary divergence in mating signals leads to reproductive isolation in
numerous animal taxa, understanding what drives signal divergence is fundamental to our …

Culture, a pillar of the remarkable ecological success of humans, is increasingly recognized
as a powerful force structuring nonhuman animal populations. A key gap between these two …

Twenty years ago, a seminal paper summarized the role of sexual selection in speciation as
the coordinated evolution of (male) courtship signals and (female) preferences leading to …

Phenotypic divergence can promote reproductive isolation and speciation, suggesting a
possible link between rates of phenotypic evolution and the tempo of speciation at multiple …

The efficacy of communication depends on the detection of species-specific signals in
background noise that includes other species' signals. To avoid confusion with each others' …

Differential gene flow, reductions in diversity following linked selection and/or features of the
genome can structure patterns of genomic differentiation during the process of speciation …

Divergence in acoustic signals between populations of animals can lead to species
recognition failure, reproductive isolation, and speciation. Character displacement may …