whooper swan[ho̵̅o̅′pər, hwo̵̅o̅′-, wo̵̅o̅′-]
a large swan (Cygnus cygnus) of the Old World, having a black-and-yellow bill
A large white swan (Cygnus cygnus) of Europe and Asia, having a loud whooping call.
(plural whooper swans)
- A species of swan, Cygnus cygnus, of the taxonomic family Anatidae.