green peafowl vs bird of Juno

green peafowl and bird of Juno both are nouns.

Word	Noun	Adjective	Verb	Adverb
green peafowl	Yes	No	No	No
bird of Juno	Yes	No	No	No

As nouns, bird of Juno is a hypernym of green peafowl; that is, bird of Juno is a word with a broader meaning than green peafowl:

green peafowl: peafowl of southeast Asia
bird of Juno: very large terrestrial southeast Asian pheasant often raised as an ornamental bird

Other hypernyms of green peafowl include peafowl.

green peafowl (noun)	bird of Juno (noun)
peafowl of southeast Asia	very large terrestrial southeast Asian pheasant often raised as an ornamental bird