This animal tracking dataset is derived from Stienen et al. (2023, https://doi.org/10.5281/zenodo.10055494), a deposit of Movebank study 2298738353. Data have been standardized to Darwin Core using the movepub R package and are downsampled to the first GPS position per hour. The original dataset description follows. LBBG_ADULT - Lesser black-backed gulls (Larus fuscus, Laridae) breeding in Belgium 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 LBBG_ADULT, using trackers developed by Ornitela (https://www.ornitela.com). The study has been operational since 2022. In total 39 individuals of lesser black-backed gull (Larus fuscus) have been tagged in the breeding colony of Zeebrugge in Belgium, mainly to study their habitat use and migration behaviour. Data are automatically synced with Movebank and from there periodically archived on Zenodo (see https://github.com/inbo/bird-tracking). This dataset was collected using infrastructure provided by INBO and funded by Research Foundation - Flanders (FWO) as part of the Belgian contribution to LifeWatch.