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Definition of tree sparrow
1 : a Eurasian sparrow (Passer montanus) that has a black spot on the ear coverts
2 : a North American sparrow (Spizella arborea) that has a single dark spot on the breast and breeds in Alaska and northern Canada and winters in the U.S.
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Time Traveler for tree sparrow
The first known use of tree sparrow was circa 1770
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