yellowbird vs Spinus tristis

yellowbird and Spinus tristis both are nouns.

Word	Noun	Adjective	Verb	Adverb
yellowbird	Yes	No	No	No
Spinus tristis	Yes	No	No	No

As nouns, yellowbird and Spinus tristis are synonyms defined as:

yellowbird and Spinus tristis: American finch whose male has yellow body plumage in summer

Other synonyms of yellowbird include goldfinch, New World goldfinch.

yellowbird (noun)	Spinus tristis (noun)
American finch whose male has yellow body plumage in summer	American finch whose male has yellow body plumage in summer
yellow-throated American wood warbler