Lagopus scoticus vs red grouse

Lagopus scoticus and red grouse both are nouns.

Word	Noun	Adjective	Verb	Adverb
Lagopus scoticus	Yes	No	No	No
red grouse	Yes	No	No	No

As nouns, Lagopus scoticus and red grouse are synonyms defined as:

Lagopus scoticus and red grouse: reddish-brown grouse of upland moors of Great Britain

Other synonyms of Lagopus scoticus include moor-bird, moorbird, moorfowl, moorgame.

Lagopus scoticus (noun)	red grouse (noun)
reddish-brown grouse of upland moors of Great Britain	reddish-brown grouse of upland moors of Great Britain