grey catbird vs Dumetella carolinensis

grey catbird and Dumetella carolinensis both are nouns.

Word	Noun	Adjective	Verb	Adverb
grey catbird	Yes	No	No	No
Dumetella carolinensis	Yes	No	No	No

As nouns, grey catbird and Dumetella carolinensis are synonyms defined as:

grey catbird and Dumetella carolinensis: North American songbird whose call resembles a cat's mewing

Other synonyms of grey catbird include catbird, gray catbird.

grey catbird (noun)	Dumetella carolinensis (noun)
North American songbird whose call resembles a cat's mewing	North American songbird whose call resembles a cat's mewing