Rooks (Corvus frugilegus) are an invasive bird species in South Korea that are deemed harmful due to nocturnal urban invasions and agricultural damage. Employing citizen science data, we document the daily movement patterns and habitat associations of nocturnal urban-invading rooks in Suwon, South Korea. We collected 4,522 geolocated observations from December 2021 to March 2022, categorized by the timings of sunrise and sunset and segmented into 3-h intervals. Using the MaxENT (Maximum Entropy Model) and k-fold cross-validation (k = 10) with a 25% random test sample, we analyzed daily movement patterns and habitat preferences. Our results show that rooks forage in agricultural areas shortly after sunrise and roost in urban environments after sunset. Urban roosts tend to occur in areas near buildings of medium height (6–20 stories) that are illuminated by artificial light and contain utility poles. The variables with the highest percent contribution to rooks’ presence after sunset were buildings of medium height (20.7%), land use type (19.4%), elevation (29%), and utility pole (14.5%). Our findings emphasize the potential of citizen science initiatives to generate insights into the ecology of invasive bird species within large urban environments.

白嘴鸦（Corvus frugilegus）是韩国的一种入侵鸟类，由于夜间城市入侵和农业破坏而被认为是有害的。利用公民科学数据，我们记录了韩国水原夜间城市入侵乌鸦的日常活动模式和栖息地关联。我们收集了 2021 年 12 月至 2022 年 3 月期间的 4,522 个地理定位观测值，按日出和日落的时间进行分类，并分为 3 小时的间隔。使用 MaxENT（最大熵模型）和 k 倍交叉验证 (k = 10) 以及 25% 随机测试样本，我们分析了日常运动模式和栖息地偏好。我们的结果表明，白嘴鸦在日出后不久在农业地区觅食，在日落后在城市环境中栖息。城市栖息地往往出现在中等高度（6-20层）建筑物附近的区域，这些建筑物有人造光照明并包含电线杆。对日落后白嘴鸦出现贡献率最高的变量是中等高度的建筑物（20.7%）、土地利用类型（19.4%）、海拔（29%）和电线杆（14.5%）。我们的研究结果强调了公民科学倡议的潜力，可以深入了解大城市环境中入侵鸟类物种的生态。