white sheep vs Ovis montana dalli

white sheep and Ovis montana dalli both are nouns.

Word	Noun	Adjective	Verb	Adverb
white sheep	Yes	No	No	No
Ovis montana dalli	Yes	No	No	No

As nouns, white sheep and Ovis montana dalli are synonyms defined as:

white sheep and Ovis montana dalli: large white wild sheep of northwestern Canada and Alaska

Other synonyms of white sheep include Dall's sheep, Dall sheep.

white sheep (noun)	Ovis montana dalli (noun)
large white wild sheep of northwestern Canada and Alaska	large white wild sheep of northwestern Canada and Alaska