The Common Potoo Nyctibius griseus is abundant, charismatic and generally considered to be sedentary across its range. Using citizen science data from eBird and WikiAves, we demonstrate that the Common Potoo may be a partial migrant whose breeding populations depart southeastern Brazil, Uruguay and northern Argentina in May to August during the region’s austral winter. MaxEnt models revealed that spatio‐temporal shifts in Common Potoo distributions were driven by seasonal changes in temperature and precipitation. We examined potential seasonal detection biases by restricting our analysis to daytime observations and testing for seasonally dependent shifts in distribution for two nocturnal non‐migratory species. Our results provide the first evidence of migration for any member of the family Nyctibiidae. Our approach exposes the potential value that WikiAves data offer towards elucidating seasonal movements of South American birds.

中文翻译：

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公民科学数据揭示了巴西普通Potoo Nyctibius griseus的秘密迁移

常见的Pooto Nyctibius griseus具有丰富的魅力，通常在其范围内久坐不动。使用来自eBird和WikiAves的公民科学数据，我们证明了“普通布谷鸟”可能是部分迁徙者，在该地区的南方冬季期间，他们的繁殖种群于5月至8月离开巴西东南部，乌拉圭和阿根廷北部。MaxEnt模型显示，普通Potoo分布的时空变化是由温度和降水的季节性变化驱动的。通过将我们的分析限制在白天进行观察，并测试了两个非夜行性物种的季节性分布变化，我们研究了潜在的季节性检测偏差。我们的结果为Nyctibiidae家族的任何成员提供了迁移的第一个证据。