Crossword Genius

North American songbird (seen over the White Cliffs of Dover?) (8)

Ross

I believe the answer is:

bluebird

(Other definitions for bluebird that I've seen before include "symbol of happiness" , "Racing car" , "North American songbird (once seen over Dover?)" , "American member of thrush family (seen over Dover?)" , "Name of the cars and boats in which Malcolm and Donald Campbell set land and water speed records" .)

I've seen this clue in The Guardian.
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