monarch butterfly vs danaid

monarch butterfly and danaid both are nouns.

Word	Noun	Adjective	Verb	Adverb
monarch butterfly	Yes	No	No	No
danaid	Yes	No	No	No

As nouns, danaid is a hypernym of monarch butterfly; that is, danaid is a word with a broader meaning than monarch butterfly:

monarch butterfly: large migratory American butterfly having deep orange wings with black and white markings; the larvae feed on milkweed
danaid: large tropical butterfly with degenerate forelegs and an unpleasant taste

Other hypernyms of monarch butterfly include danaid butterfly.

monarch butterfly (noun)	danaid (noun)
large migratory American butterfly having deep orange wings with black and white markings; the larvae feed on milkweed	large tropical butterfly with degenerate forelegs and an unpleasant taste