Koffijberg K, Prior N, Clausen P, Brides K, Kowallik C, Hornman M, et al. Decline of the Bewick’s Swan Cygnus columbianus bewickii population wintering in Northeast/Northwest Europe. Wildfowl [Internet]. 2025 Dec. 12 [cited 2025 Dec. 13];75:63–93. Available from: https://tidsskrift.dk/Wildfowl/article/view/162735