European roller vs Coracias garrulus

European roller and Coracias garrulus both are nouns.

Word	Noun	Adjective	Verb	Adverb
European roller	Yes	No	No	No
Coracias garrulus	Yes	No	No	No

As nouns, European roller and Coracias garrulus are synonyms defined as:

European roller and Coracias garrulus: common European blue-and-green roller with a reddish-brown back

European roller (noun)	Coracias garrulus (noun)
common European blue-and-green roller with a reddish-brown back	common European blue-and-green roller with a reddish-brown back