Inglis, I. R., Lazarus, J. and Torrance, R. (1989) “The pre-nesting behaviour and time budget of the Harlequin Duck Histrionicus histrionicus”, Wildfowl, pp. 55–73. Available at: https://tidsskrift.dk/Wildfowl/article/view/154019 (Accessed: 16 December 2025).