Danaus plexippus vs milkweed butterfly

Danaus plexippus and milkweed butterfly both are nouns.

Word	Noun	Adjective	Verb	Adverb
Danaus plexippus	Yes	No	No	No
milkweed butterfly	Yes	No	No	No

As nouns, Danaus plexippus and milkweed butterfly are synonyms defined as:

Danaus plexippus and milkweed butterfly: large migratory American butterfly having deep orange wings with black and white markings; the larvae feed on milkweed

Other synonyms of Danaus plexippus include monarch, monarch butterfly.

Danaus plexippus (noun)	milkweed butterfly (noun)
large migratory American butterfly having deep orange wings with black and white markings; the larvae feed on milkweed	large migratory American butterfly having deep orange wings with black and white markings; the larvae feed on milkweed