Aunins, A, Lappalainen, A, Fleet, D M, Stienen, E, Haas, F, Simian, G, Glemarec, G, Mitchell, I, Petersen, I K, Luigujoe, L, Arsuaga, M L, Frederiksen, M, Markones, N, Schekkerman, H & Dierschke, V 2018, Report of the Joint OSPAR/HELCOM/ICES Working Group on Marine Birds (JWGBIRD) . International Council for the Exploration of the Sea (ICES), Copenhagen, Denmark .