Biological rhythms of nearly all animals on earth are synchronized with natural light and are aligned to day‐and‐night transitions. Here, we test the hypothesis that the lunar cycle affects the nocturnal flight activity of European Nightjars (Caprimulgus europaeus) . We describe daily activity patterns of individuals from three different countries across a wide geographic area, during two discrete periods in the annual cycle. Although the sample size for two of our study sites is small, the results are clear in that on average individual flight activity was strongly correlated with both local variation in day length and with the lunar cycle. We highlight the species’ sensitivity to changes in ambient light and its flexibility to respond to such changes in different parts of the world.

中文翻译：

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黄昏鸟类食虫动物日常活动模式的月球同步。

地球上几乎所有动物的生物节律都与自然光同步，并与昼夜转换保持一致。在这里，我们测试了月球周期影响欧洲夜鹰（ Caprimulgus europaeus）夜间飞行活动的假设。我们描述了来自三个不同国家、跨越广阔地理区域的个人在年度周期的两个离散时期的日常活动模式。尽管我们两个研究地点的样本量很小，但结果很明显，平均个人飞行活动与当地的日长变化和月球周期密切相关。我们强调该物种对环境光变化的敏感性及其对世界不同地区此类变化做出反应的灵活性。