Morrison, Catriona A.; Butler, Simon J.; Robinson, Robert A.; Clark, Jacquie A.; Arizaga, Juan; Aunins, Ainars; Baltà, Oriol; Cepák, Jaroslav; Chodkiewicz, Tomasz; Escandell, Virginia; Foppen, Ruud P.B.; Gregory, Richard D.; Husby, Magne; Jiguet, Frédéric; Kålås, John Atle; Lehikoinen, Aleksi; Lindström, Åke; Moshøj, Charlotte M.; Nagy, Károly; Nebot, Arantza Leal; Piha, Markus; Reif, Jiří; Sattler, Thomas; Škorpilová, Jana; Szép, Tibor; Teufelbauer, Norbert; Thorup, Kasper; van Turnhout, Chris; Wenninger, Thomas; Gill, Jennifer A. (Peer reviewed; Journal article, 2021)