Hughes, B., Kirby, J. and Rowcliffe, J. M. (1999) “Waterbird conflicts in Britain and Ireland: Ruddy Ducks Oxyura jamaicensis, Canada Geese Branta canadensis, and Cormorants Phalacrocorax carbo”, Wildfowl, pp. 77–99. Available at: https://tidsskrift.dk/Wildfowl/article/view/154581 (Accessed: 16 December 2025).