Data from: Recent northward range expansion promotes song evolution in a passerine bird, the Light-vented Bulbul

Xiaoying Xing, Per Alström, Xiaojing Yang, Fumin Lei, F. M. Lei & X. J. Yang
In common with human speech, song is culturally inherited in oscine passerine birds (‘songbirds’). Intraspecific divergence in birdsong, such as development of local dialects, might be an important early step in the speciation process. It is therefore vital to understand how songs diverge, especially in founding populations. The northward expansion of the Light-vented Bulbul Pycnonotus sinensis (J. F. Gmelin, 1789) into north China in the last 30 years provides an excellent opportunity to study birdsong...
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