Melanerpes erythrocephalus vs redheaded woodpecker

Melanerpes erythrocephalus and redheaded woodpecker both are nouns.

Word	Noun	Adjective	Verb	Adverb
Melanerpes erythrocephalus	Yes	No	No	No
redheaded woodpecker	Yes	No	No	No

As nouns, Melanerpes erythrocephalus and redheaded woodpecker are synonyms defined as:

Melanerpes erythrocephalus and redheaded woodpecker: black-and-white North American woodpecker having a red head and neck

Other synonyms of Melanerpes erythrocephalus include redhead.

Melanerpes erythrocephalus (noun)	redheaded woodpecker (noun)
black-and-white North American woodpecker having a red head and neck	black-and-white North American woodpecker having a red head and neck