peafowl vs Pavo muticus

peafowl and Pavo muticus both are nouns.

Word	Noun	Adjective	Verb	Adverb
peafowl	Yes	No	No	No
Pavo muticus	Yes	No	No	No

As nouns, Pavo muticus is a hyponym of peafowl; that is, Pavo muticus is a word with a more specific, narrower meaning than peafowl:

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

Other hyponyms of peafowl include pea-chick, peachick, peacock, peahen, blue peafowl, Pavo cristatus, green peafowl.

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