Highlights•Although understudied, recent studies suggest that female birdsong is
widespread.•We compared male and female song using a novel statistical equivalence …

Divergence and convergence in acoustic signals may be driven by different processes.
Uncertainty about which of these processes best explains the patterns of acoustic variation …

Because of complex patterns of Pleistocene land connections across its land masses, the
Sundaic region is particularly interesting for studying the mechanisms of biological …

Female song has been significantly understudied compared with male song, and our
understanding of how this elaborate signal trait may function has been limited as a result …

Female birds in many temperate species are thought to sing reduced or quieter songs and
appear to sing less often than their male counterparts. Therefore, female song may be easily …

Abstract Models of allopatric speciation within an island biogeographic framework suggest
that the division of ancestral mainland populations leads to one or more allopatric island …

Most of our knowledge about the function, evolution, neurobiology and ontogeny of complex
vocalizations in birds comes from previous work on male song. However, the recent …

A survey of recent taxonomic studies of birds that included acoustic trait analyses reveals
that most studies have not archived the sound recordings that support their conclusions …

Geographic variation in acoustic signals can be important in species divergence, especially
the maintenance of prezygotic barriers to gene flow. Furthermore, selective pressures on …

As two lineages diverge from one another, mitochondrial DNA should evolve fixed
differences more rapidly than nuclear DNA due to its smaller effective population size and …