Passerina cyanea vs indigo bird

Passerina cyanea and indigo bird both are nouns.

Word	Noun	Adjective	Verb	Adverb
Passerina cyanea	Yes	No	No	No
indigo bird	Yes	No	No	No

As nouns, Passerina cyanea and indigo bird are synonyms defined as:

Passerina cyanea and indigo bird: small deep blue North American bunting

Other synonyms of Passerina cyanea include indigo bunting, indigo finch.

Passerina cyanea (noun)	indigo bird (noun)
small deep blue North American bunting	small deep blue North American bunting