bluebill

1. Diving ducks of North America having a bluish-grey bill (synset 101854016)
   is a type of: duck - small wild or domesticated web-footed broad-billed swimming bird usually having a depressed body and short legs
   subtypes:

   • aythya marila, greater scaup - large scaup of North America having a greenish iridescence on the head of the male
   • aythya affinis, lake duck, lesser scaup, lesser scaup duck - common scaup of North America; males have purplish heads
   belongs to: aythya, genus aythya - canvasback; redhead; pochard; etc.
   same as: broadbill, scaup, scaup duck

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