Wilson's blackcap vs Wilsonia pusilla

Wilson's blackcap and Wilsonia pusilla both are nouns.

Word	Noun	Adjective	Verb	Adverb
Wilson's blackcap	Yes	No	No	No
Wilsonia pusilla	Yes	No	No	No

As nouns, Wilson's blackcap and Wilsonia pusilla are synonyms defined as:

Wilson's blackcap and Wilsonia pusilla: yellow wood warbler with a black crown

Other synonyms of Wilson's blackcap include Wilson's warbler.

Wilson's blackcap (noun)	Wilsonia pusilla (noun)
yellow wood warbler with a black crown	yellow wood warbler with a black crown