@article {58470, title = {Regional differences in the song characteristics of Pallas{\textquoteright}s Leaf Warbler Phylloscopus proregulus in north-east Asia}, journal = {Journal of Asian Ornithology}, volume = {38}, year = {2022}, pages = {29-33}, chapter = {29}, abstract = {

Intra-specific variation in avian songs can be complex and often remains understudied in species that exhibit pronounced dialectal
differentiation. Pallas\’s Leaf Warbler Phylloscopus proregulus is a migratory bird that breeds across mountainous forests from southern
Siberia to the Far East of northern Asia. However, to date, studies on the songs of this species have been limited to the western area of their
breeding range. Here, we document song differences among Pallas\’s Leaf Warbler populations across north-east Asia. The population in
the Mongolia\–Baikal region exhibited significant differences in its acoustic properties from the populations of the Amur River basin and
South Korea. On the other hand, the songs of the Amur River basin and South Korea were not different from each other. Considering the
forest connectivity between the Amur River basin and Korean peninsula, our findings suggest population structure in Pallas\’s Leaf Warblers
between the Mongolia\–Baikal region and the Amur\–Korea region. To better understand the relationships between these two populations,
a combination of bioacoustic and population-genetic studies coupled with migratory monitoring is recommended.

}, author = {Hae-Min Seo and Eun-Jeong Kim and CHan-Ryul Park} } @article {53408, title = {Singing of Claudia{\textquoteright}s Leaf-warbler (Phylloscopus claudiae) in aggressive contexts: role of song rate, song type diversity and song type transitional pattern}, journal = {Journal of Ornithology}, year = {2018}, month = {Aug-12-2018}, abstract = {

In many songbirds, males vary certain aspects of their singing behavior when engaged in territorial interactions. Song rate, song type switching rate, song matching, song overlapping, and the usage of specific song types were proposed to be aggressive signals. It is well known that transitions between different song types in a song sequence are non-random in many species, but the signaling significance of non-random vocal streams is poorly understood. We asked whether singing plays a role in male\–male interactions in Claudia\’s Leaf-warbler. Along with more traditional metrics (i.e., song length, song rate, song type switching rate and song type diversity), we used (1) song sequence linearity (SLIN) and consistency (SCONS) indexes, and (2) applied an information theory approach by means of a first-order relative entropy (RE1) calculation to analyze the role of song type transitional patterns in male\–male interactions. The study was conducted in April\–June 2016 in Hupingshan National Nature Reserve, Hunan province, China. We simulated territorial intrusion by broadcasting Claudia\’s Leaf-warbler songs in territories. Experiments involved 14 different males. A comparison of spontaneous singing with that elicited by playback showed that song rate and song type diversity increased, and that entropy decreased. By contrast, SLIN and SCONS, though significantly correlated with RE1, did not differ between spontaneous singing and singing in response to playback. The decrease of entropy means that the transitions between different song types in a song sequence were determined more by specific factors and predictable and thus more non-random. However, these results were weak, as the decrease of RE1 did not coincide with the expected increase of SLIN, SCONS and S. Our results are thus partly consistent with the idea that non-random vocal structures, along with other song parameters, could play a role in male\–male competition.

}, keywords = {birdsong, communication, Entropy, Playback experiments, Territory}, issn = {2193-7192}, doi = {10.1007/s10336-018-1614-4}, url = {http://link.springer.com/10.1007/s10336-018-1614-4}, author = {Opaev, Alexey and Kolesnikova, Yulia and Liu, Meishi and Kang, Zujie} } @article {53262, title = {A striking new species of leaf warbler from the Lesser Sundas as uncovered through morphology and genomics}, journal = {Scientific Reports}, volume = {8}, year = {2018}, month = {Jan-12-2018}, abstract = {

Leaf warblers (Aves; Phylloscopidae) are a diverse clade of insectivorous, canopy-dwelling songbirds widespread across the Old World. The taxonomy of Australasian leaf warblers is particularly complex, with multiple species-level divergences between island taxa in the region requiring further scrutiny. We use a combination of morphology, bioacoustics, and analysis of thousands of genome-wide markers to investigate and describe a new species of Phylloscopus leaf warbler from the island of Rote in the Lesser Sundas, Indonesia. We show that this new Rote Leaf Warbler is morphologically and genomically highly distinct from its congenerics, but do not find vocal differentiation between different island taxa. We discuss the behaviour and ecology of this highly distinctive new species, and make recommendations about its conservation status. We believe this constitutes the first description of a novel bird species that is partly based on insights from massive amounts of genome-wide DNA markers.

}, doi = {10.1038/s41598-018-34101-7}, url = {http://www.nature.com/articles/s41598-018-34101-7}, author = {Ng, Nathaniel. S. R. and Prawiradilaga, Dewi. M. and Ng, Elize. Y. X. and Suparno and Ashari, Hidayat and Colin R. Trainor and Verbelen, Philippe and Rheindt, Frank. E.} }