In this data paper three datasets are described containing GPS tracking and acceleration data of Western marsh harriers (Circus aeruginosus) breeding in Belgium and the Netherlands. The Western marsh harrier is included as a threatened bird species in Annex I of the European Bird Directive due to the steep decline in population densities. In order to collect data of habitat use and migration behaviour, Western marsh harriers were equipped with light-weight solar powered GPS trackers developed by the Institute for Biodiversity and Ecosystem Dynamics (IBED) at the University of Amsterdam (University of Amsterdam Bird Tracking System, UvA-BiTS). These trackers automatically collect and store data on the bird’s activity and 3D position in time and transmit these data to ground stations. The datasets were collected by the Research Institute for Nature and Forest (INBO) and the Dutch Montagu’s Harrier Foundation. Tracked Western marsh harriers were breeding in the northeast of the Dutch province of Groningen and on the opposite side of the river Ems in Germany (H_GRONINGEN), in the region of Waterland-Oudeman near the Belgian-Dutch border (MH_WATERLAND), and at the left bank of the Scheldt estuary, close to the Belgian-Dutch border and north of the city of Antwerp (MH_ANTWERPEN). Most individuals remained within 10 km from their nesting sites during the breeding season and wintered in West Africa. H_GRONINGEN contains 987,493 GPS fixes and 3,853,859 acceleration records of four individuals since 2012. MH_WATERLAND contains 377,910 GPS fixes of seven individuals. Sampling in this region began in 2013. Three more Western marsh harriers were tagged in the Scheldt estuary near Antwerp more recently in 2018 (one individual) and 2019 (two individuals) for the MH_ANTWERPEN study, which contains 47,917 GPS fixes and 227,746 acceleration records. The three Western marsh harrier datasets were published as separate studies in Movebank (https://www.movebank.org) and archived as data packages in Zenodo (https://www.zenodo.org) to ensure long-term preservation and versioning of the data.

中文翻译：

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在比利时和荷兰繁殖的西部沼泽rier的GPS跟踪数据。

在此数据文件中，描述了三个数据集，其中包含GPS跟踪和比利时和荷兰繁殖的西部沼泽（Circus aeruginosus）的加速度数据。由于人口密度的急剧下降，西方沼泽被列为欧洲鸟类指令附件一中的濒危鸟类。为了收集栖息地使用和迁徙行为的数据，西方沼泽配备了由阿姆斯特丹大学生物多样性和生态系统动力学研究所（IBED）开发的轻型太阳能GPS追踪器（阿姆斯特丹大学鸟类追踪系统， UvA-BiTS）。这些跟踪器会自动收集并及时存储有关鸟类活动和3D位置的数据，并将这些数据传输到地面站。数据集由自然与森林研究所（INBO）和荷兰蒙塔古的哈里尔基金会收集。在荷兰格罗宁根省的东北部以及德国的埃姆斯河（H_GRONINGEN）的对面，比利时和荷兰边境附近的沃特兰-奥德曼地区（MH_WATERLAND）和荷兰的格罗宁根省的东北部，都追踪有西部沼泽的繁殖。希尔德河口左岸，靠近比利时－荷兰边境，在安特卫普市（MH_ANTWERPEN）北部。在繁殖季节，大多数个体都离巢点10公里以内，并且在西非越冬。自2012年以来，H_GRONINGEN包含四个人的987,493个GPS定位和3,853,859加速度记录。MH_WATERLAND包含七个人的377,910个GPS定位。该区域的采样始于2013年。MH_ANTWERPEN研究于2018年（一名）和2019年（两名）在安特卫普附近的Scheldt河口又标记了三只西方沼泽，用于MH_ANTWERPEN研究，该研究包含47,917个GPS定位和227,746个加速记录。这三个西方沼泽的数据集在Movebank（https://www.movebank.org）中作为独立研究发表，并在Zenodo（https://www.zenodo.org）中作为数据包存档，以确保长期保存和版本控制的数据。