Meier CM, Liechti F. 2020. Switzerland Solothurn - Long term study on migratory movement of Alpine swifts (Apus melba)-tracks. Movebank Data Repository. <a href="https://doi.org/10.5441/001/1.nn518dc4/3">https://doi.org/10.5441/001/1.nn518dc4/3</a>