Passer montanus vs tree sparrow

Passer montanus and tree sparrow both are nouns.

Word	Noun	Adjective	Verb	Adverb
Passer montanus	Yes	No	No	No
tree sparrow	Yes	No	No	No

As nouns, Passer montanus and tree sparrow are synonyms defined as:

Passer montanus and tree sparrow: Eurasian sparrow smaller than the house sparrow

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