Definition of American tree sparrow
: tree sparrow sense 2
… the American tree sparrow does not spend much time in trees. It would better be called "brush sparrow" … — Benjamin P. Burtt, Post Standard (Syracuse, New York), 9 May 2010
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Merriam-Webster unabridged
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Time Traveler for American tree sparrow
The first known use of American tree sparrow was in 1883
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