barnacle goose vs Branta leucopsis

barnacle goose and Branta leucopsis both are nouns.

Word	Noun	Adjective	Verb	Adverb
barnacle goose	Yes	No	No	No
Branta leucopsis	Yes	No	No	No

As nouns, barnacle goose and Branta leucopsis are synonyms defined as:

barnacle goose and Branta leucopsis: European goose smaller than the brant; breeds in the far north

Other synonyms of barnacle goose include barnacle.

barnacle goose (noun)	Branta leucopsis (noun)
European goose smaller than the brant; breeds in the far north	European goose smaller than the brant; breeds in the far north