Long-term variability in the song of the thrush nightingale (Luscinia luscinia) and its relations to the territorial behavior of males

Ivanitskii, V.; Bezrukova, J.; Grebenkova, A.; Mikhylova, M.; Opaev, A.; Vlasov, A.; Marova, I.

Авторы: Ivanitskii Vladimir, Bezrukova Julia, Grebenkova Anastasia, Mikhylova Maria, Opaev Aleksey, Vlasov Andrei, Marova Irina
Журнал: Behavioural Processes
Том: 230
Год издания: 2025
Издательство: Elsevier BV
Местоположение издательства: Netherlands
Номер статьи: 105228
DOI: 10.1016/j.beproc.2025.105228
Аннотация: Researchers have paid a lot of attention to the temporal variability of birdsong. Data obtained during long-term observations are of particular interest in this context. In this article, we present evidence of the long-term dynamics of thrush nightingale singing in the Kursk region (Russia) over a period of almost half a century. The average size of individual repertoires remained relatively stable throughout the entire observation period, even though there was an almost twofold increase in the total size of the population’s repertoire. Over 40 years (1975–2014), the population repertoire of song types changed completely. For five years (2014–2018), the repertoire remained relatively stable, while in the next six years (2018–2023), it changed completely again. Thus, the evolution of population song repertoires over time includes both periods of relative stability and periods of rapid change, with the dialect composition completely transforming within just a few years. In playback experiments, we tested male responses to changes in song over time to determine how song evolution has affected the effectiveness of song as a signal in male–male competition. There were no obvious differences in the responses of territorial males to the playback of songs recorded in 1975 and 2023. We hypothesize that thrush nightingales are well adapted to the frequent and relatively rapid changes in the local dialect, which is why their response to playback does not significantly depend on the specific recording.
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Long-term variability in the song of the thrush nightingale (Luscinia luscinia) and its relations to the territorial behavior of malesстатья

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