the small North American subspecies, Cygnus columbianus columbianus, of the tundra swan.
Origin of whistling swan
First recorded in 1775–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for whistling swan
a white North American swan, Cygnus columbianus, with a black bill and straight neckCompare mute swan
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012