A diving duck with a blue-gray bill, found in North American waters.
Compound of 'blue' and 'bill,' referring to the distinctive coloring of the duck's beak. Used by birdwatchers and hunters since the 19th century.
Bluebills are expert underwater swimmers who can dive so deep for food that the pressure would crush most birds—their blue bills are easy to spot, but spotting them alive requires patience and early mornings!
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