Petrie MJ, Drobney RD, Sears DT, Armstrong LM. Evidence for Mallard Anas platyrhynchos and American Black Duck Anas rubripes 144 competition in western New Brunswick, Canada. Wildfowl [Internet]. 2012 Jan. 1 [cited 2025 Dec. 16];:146-64. Available from: https://tidsskrift.dk/Wildfowl/article/view/153559