tree sparrow

Noun tree sparrow has 2 senses

• tree sparrow(n = noun.animal) passer montanus - Eurasian sparrow smaller than the house sparrow;
is a kind of sparrow, true sparrow
is a member of genus passer, passer

• tree sparrow(n = noun.animal) spizella arborea - finch common in winter in the northern U.S.;
is a kind of new world sparrow
is a member of genus spizella, spizella