Noun cygnus columbianus has 1 sense
  1. tundra swan, Cygnus columbianus - swan that nests in tundra regions of the New and Old Worlds
    --1 is a kind of swan
    --1 is a member of Cygnus, genus Cygnus
    --1 has particulars:
     whistling swan, Cygnus columbianus columbianus; Bewick's swan, Cygnus columbianus bewickii
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