Newth J, Colhoun K, Einarsson O, McElwaine G, Thorstensen S, Hesketh R, et al. Winter distribution of Whooper Swans Cygnus cygnus ringed in four geographically discrete regions in Iceland between 1988 and 2006: an update. Wildfowl [Internet]. 2013 Apr. 16 [cited 2025 Dec. 16];:98-119. Available from: https://tidsskrift.dk/Wildfowl/article/view/153870