Johnson, I. P. and Sibly, R. M. (1993) “Pre-breeding behaviour affects condition, assessed by abdominal profile, and hence breeding success of Canada Geese Branta canadensis”, Wildfowl, 44, pp. 60–68. Available at: https://tidsskrift.dk/Wildfowl/article/view/154698 (Accessed: 8 June 2026).