a commonly domesticated soundless white swan,
of Europe and Asia.
a Eurasian swan,
with a pure white plumage, an orange-red bill with a black base, and a curved neck
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
At nesting time the mute swan cob is especially dangerous.
There's another swan that can be confused with the trumpeter and that is the mute swan.