tree sparrow vs Spizella arborea

tree sparrow and Spizella arborea both are nouns.

Word	Noun	Adjective	Verb	Adverb
tree sparrow	Yes	No	No	No
Spizella arborea	Yes	No	No	No

As nouns, tree sparrow and Spizella arborea are synonyms defined as:

tree sparrow and Spizella arborea: finch common in winter in the northern U.S.

tree sparrow (noun)	Spizella arborea (noun)
Eurasian sparrow smaller than the house sparrow	finch common in winter in the northern U.S.
finch common in winter in the northern U.S.