blackpoll vs New World warbler

blackpoll and New World warbler both are nouns.

Word	Noun	Adjective	Verb	Adverb
blackpoll	Yes	No	No	No
New World warbler	Yes	No	No	No

As nouns, New World warbler is a hypernym of blackpoll; that is, New World warbler is a word with a broader meaning than blackpoll:

blackpoll: North American warbler having a black-and-white head
New World warbler: small bright-colored American songbird with a weak unmusical song

Other hypernyms of blackpoll include wood warbler.

blackpoll (noun)	New World warbler (noun)
North American warbler having a black-and-white head	small bright-colored American songbird with a weak unmusical song