East Atlantic Flyway assessment 2020: The status of coastal waterbird populations and their sites, 69-74 STARTPAGE=69;ENDPAGE=74;TITLE=East Atlantic Flyway assessment 2020
Clausen, P, Nielsen, R D, Bregnballe, T, Sterup, J & Petersen, I K 2020, Denmark : The January 2020 count of waterbirds in Denmark . in M van Roomen, G Agblonon, T Langendoen, G Citegetse, A Y Diallo, K Gueye, E van Winden & G Lüerßen (eds), Simultaneous January 2020 waterbird and wetland census along the East Atlantic Flyway : National reports . Common Wadden Sea Secretariat, S.l., pp. 31-33 . < https://www.waddensea-worldheritage.org/sites/default/files/2020_Flyway%20census%20report.pdf >
Bregnballe, T, Kleefstra, R, Scheiffarth, G, Günther, K, Hälterlein, B, Ludwig, J, Koffijberg, K, Reichert, G, Umland, J, Frikke, J, Hornman, M, Körber, P, Hansen, M B & van Roomen, M 2018, Trends of waterbird populations in the Wadden Sea in comparison with flyway trends . in M van Roomen, S Nagy, G Citegetse & H Schekkerman (eds), East Atlantic Flyway Assessment 2017: the status of coastal waterbird populations and sites . pp. 33-43 . < https://www.waddensea-worldheritage.org/resources/east-atlantic-flyway-assessment-2017 > Aarhus University