Olson D. Rocky Mountain Population of Trumpeter Swans Cygnus buccinator (U.S. Breeding Segment): results of the autumn 2022 survey and long-term trends. Wildfowl [Internet]. 2024 Nov. 14 [cited 2025 Dec. 16];:76-88. Available from: https://tidsskrift.dk/Wildfowl/article/view/161406