redstart vs flycatching warbler

redstart and flycatching warbler both are nouns.

Word	Noun	Adjective	Verb	Adverb
redstart	Yes	No	No	No
flycatching warbler	Yes	No	No	No

As nouns, flycatching warbler is a hypernym of redstart; that is, flycatching warbler is a word with a broader meaning than redstart:

redstart: flycatching warbler of eastern North America the male having bright orange on sides and wings and tail
flycatching warbler: any of numerous American wood warblers that feed on insects caught on the wing

redstart (noun)	flycatching warbler (noun)
European songbird with a reddish breast and tail; related to Old World robins	any of numerous American wood warblers that feed on insects caught on the wing
flycatching warbler of eastern North America the male having bright orange on sides and wings and tail