Dendroica fusca vs wood warbler

Dendroica fusca and wood warbler both are nouns.

Word	Noun	Adjective	Verb	Adverb
Dendroica fusca	Yes	No	No	No
wood warbler	Yes	No	No	No

As nouns, wood warbler is a hypernym of Dendroica fusca; that is, wood warbler is a word with a broader meaning than Dendroica fusca:

Dendroica fusca: black-and-white North American wood warbler having an orange-and-black head and throat
wood warbler: small bright-colored American songbird with a weak unmusical song

Other hypernyms of Dendroica fusca include New World warbler.

Dendroica fusca (noun)	wood warbler (noun)
black-and-white North American wood warbler having an orange-and-black head and throat	small bright-colored American songbird with a weak unmusical song
	European woodland warbler with dull yellow plumage