. 2022 Oct 3;1123:31–45. doi: 10.3897/zookeys.1123.90623
Henk-Jan van der Kolk, Peter Desmet, Kees Oosterbeek, Andrew M. Allen, Martin J. Baptist, Roeland A. Bom, Sarah C. Davidson, Jan de Jong, Hans de Kroon, Bert Dijkstra, Rinus Dillerop, Adriaan M. Dokter, Magali Frauendorf, Tanja Milotić, Eldar Rakhimberdiev, Judy Shamoun-Baranes, Geert Spanoghe, Martijn van de Pol, Gunther Van Ryckegem, Joost Vanoverbeke, Eelke Jongejans, Bruno J. Ens
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Figure 3.
Number of GPS records per dataset per year.