rusty grackle vs Euphagus carilonus

rusty grackle and Euphagus carilonus both are nouns.

Word	Noun	Adjective	Verb	Adverb
rusty grackle	Yes	No	No	No
Euphagus carilonus	Yes	No	No	No

As nouns, rusty grackle and Euphagus carilonus are synonyms defined as:

rusty grackle and Euphagus carilonus: North American blackbird whose bluish-black plumage is rusty-edged in the fall

Other synonyms of rusty grackle include rusty blackbird.

rusty grackle (noun)	Euphagus carilonus (noun)
North American blackbird whose bluish-black plumage is rusty-edged in the fall	North American blackbird whose bluish-black plumage is rusty-edged in the fall