MH_WATERLAND - Western marsh harriers (Circus aeruginosus, Accipitridae) breeding near the Belgium-Netherlands border is a bird tracking dataset published by the Research Institute for Nature and Forest (INBO) . It contains animal tracking data collected by the LifeWatch GPS tracking network for large birds ( http://lifewatch.be/en/gps-tracking-network-large-birds ) for the project/study MH_WATERLAND , using trackers developed by the University of Amsterdam Bird Tracking System (UvA-BiTS, http://www.uva-bits.nl ). The study was operational from 2013 until 2018. In total 7 individuals of western marsh harrier ( Circus aeruginosus ) have been tagged in their breeding area near the Belgium-Netherlands border (provinces of East Flanders in Belgium and Zeeland in the Netherlands), mainly to study their habitat use and migration behaviour. Data are uploaded from the UvA-BiTS database to Movebank and from there archived on Zenodo (see https://github.com/inbo/bird-tracking ). No new data are expected. See Milotic et al. (2020, https://doi.org/10.3897/zookeys.947.52570 ) for a more detailed description of this dataset. Data in this package are exported from Movebank study MH_WATERLAND - Western marsh harriers (Circus aeruginosus, Accipitridae) breeding near the Belgium-Netherlands border (Movebank Study ID 604806671), which can be viewed at https://www.movebank.org/cms/webapp?gwt_fragment=page=studies,path=study604806671 . Fields in the data follow the Movebank Attribute Dictionary ( http://vocab.nerc.ac.uk/collection/MVB ) and are described in <code>datapackage.json</code>. Files Files are structured as a Frictionless Data Package . You can access all data in R via <code>https://zenodo.org/record/6567022/files/datapackage.json</code> using frictionless . datapackage.json : technical description of the data files. MH_WATERLAND-reference-data.csv : reference data about the animals, tags and deployments. MH_WATERLAND-gps-yyyy.csv.gz : GPS data recorded by the tags, grouped by year. ; This dataset ...