heathfowl vs Lyrurus tetrix

heathfowl and Lyrurus tetrix both are nouns.

Word	Noun	Adjective	Verb	Adverb
heathfowl	Yes	No	No	No
Lyrurus tetrix	Yes	No	No	No

As nouns, heathfowl and Lyrurus tetrix are synonyms defined as:

heathfowl and Lyrurus tetrix: large northern European grouse that is black with a lyre-shaped tail

Other synonyms of heathfowl include European black grouse.

heathfowl (noun)	Lyrurus tetrix (noun)
large northern European grouse that is black with a lyre-shaped tail	large northern European grouse that is black with a lyre-shaped tail