Previous studies have revealed diel patterns in the songs of Chipping Sparrows (Spizella passerina), with songs shorter in duration before dawn than after. However, the extent to which this phenomenon generalizes to the full geographic range of these sparrows is unclear, as is the question of whether citizen‐science data can be used to detect diel patterns in song. We analyzed all available songs of Chipping Sparrows from the Macaulay Library and xeno‐canto databases and compared the distributions of song features of recordings made at different times of day. We show that, across their entire geographic range in North and Central America, Chipping Sparrows sing shorter songs before sunrise (dawn song) than after sunrise (day song). Furthermore, we show that Chipping Sparrows shorten their songs by singing fewer syllables, not by singing faster: the number of syllables per song accounts for the observed difference in duration, not the syllable nor the intersyllable duration. Our results demonstrate that recordings from public repositories can be used to determine whether daily song patterns exist in species even in the absence of prior fieldwork, and we further propose that citizen‐science recordings can be used to inform cross‐species hypotheses and facilitate future studies to determine whether diel patterns in song are associated with differences in social behavior.

中文翻译：

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使用公民科学数据检测奇奇麻雀歌曲中的diel模式

先前的研究已经揭示了Chipping Sparrows（Spizella passerina）歌曲中的diel模式），黎明前的持续时间短于歌曲后的持续时间。但是，尚不清楚这种现象在多大程度上遍及这些麻雀的整个地理范围，还不清楚是否可以使用公民科学数据来检测歌曲中的迪尔模式。我们分析了Macaulay图书馆和xeno-canto数据库中所有可用的Chipping Sparrows歌曲，并比较了一天中不同时间录制的歌曲的歌曲分布。我们显示，在北美和中美洲的整个地理范围内，奇平麻雀在日出之前（黎明之歌）比日出之后（白天之歌）唱短歌。此外，我们发现Chipping Sparrows通过唱较少的音节而不是唱得更快而缩短了歌曲：每首歌曲的音节数占观察到的持续时间差异，不是音节，也不是音节持续时间。我们的结果表明，即使没有事先的田野调查，也可以使用公共存储库中的录音来确定物种中是否存在日常歌曲模式，并且我们进一步建议，可以将公民科学录音用于告知跨物种假设并促进将来的研究。确定歌曲中的diel模式是否与社交行为差异相关。