Phasianus colchicus vs ring-necked pheasant

Phasianus colchicus and ring-necked pheasant both are nouns.

Word	Noun	Adjective	Verb	Adverb
Phasianus colchicus	Yes	No	No	No
ring-necked pheasant	Yes	No	No	No

As nouns, Phasianus colchicus and ring-necked pheasant are synonyms defined as:

Phasianus colchicus and ring-necked pheasant: common pheasant having bright plumage and a white neck ring

Phasianus colchicus (noun)	ring-necked pheasant (noun)
common pheasant having bright plumage and a white neck ring	common pheasant having bright plumage and a white neck ring