Noun
One who, or that which, whooops.
Source: Webster's dictionarySpecies attacked have ranged can be any size available from Aleutian terns ( Onychoprion aleuticus) to trumpeter and whooper swans (Cygnus buccinator & cygnus). Source: Internet
The whooper swan and tundra swan are wholly migratory, and the trumpeter swans are almost entirely migratory. Source: Internet