Blums, Peter, Aivars Mednis, Ilmars Bauga, James D Nichols, and James E Hines. “The Loss Rates of Web Tags Applied to Day-Old Anas and Aythya Ducklings”. Wildfowl 47 (November 1, 1996): 182–186. Accessed April 3, 2026. https://tidsskrift.dk/Wildfowl/article/view/154632.